Guinea Pig Diet Chart: Daily Veggies, Pellets & Vitamin C

Guinea Pig Diet Chart: The Daily Blueprint (Hay, Veggies, Pellets, Vitamin C)

If you want one “rule” that keeps guinea pigs healthy, it’s this: their diet must be built like a pyramid—mostly hay, then fresh veggies, then a small amount of quality pellets, plus daily vitamin C. This article gives you a practical guinea pig diet chart you can actually follow, with exact portions, veggie lists, vitamin C guidance, and the mistakes that cause most preventable health problems.

Before we get into the chart, remember: guinea pigs are hindgut fermenters (like tiny horses). They need constant fiber moving through the gut, and they cannot make their own vitamin C. That’s why “pretty good” diets often still lead to issues like soft stools, bloat risk, dental overgrowth, and vitamin C deficiency.

The Guinea Pig Diet Chart (Daily + Weekly Overview)

Here’s the working chart you’ll use every day. After the chart, I’ll break down each section and show exactly how to execute it.

Daily Diet Chart (Adult Guinea Pig: ~6+ months)

Foundation (All Day)

• •Hay: Unlimited grass hay (timothy, orchard, meadow) — available 24/7
• •Water: Fresh, changed daily (bottle or heavy bowl)

Fresh Veggies (Daily Total)

• •Veggies: About 1 cup per pig per day, split into 2 feedings (AM/PM)
• •Vitamin C-rich veggie daily: At least 1 serving (examples: bell pepper)

Pellets (Daily)

• •Plain, fortified pellets: 1/8 cup per pig per day (some active pigs do well on up to 1/4 cup, but start lower)

Vitamin C (Daily)

• •Supplement (if needed): Typically 25–50 mg per day per adult pig (details later)

Daily Diet Chart (Baby Guinea Pig: <6 months)

Babies are growing fast and can use a bit more concentrated nutrition.

• •Hay: Unlimited; include alfalfa hay (or alfalfa-based hay blend)
• •Pellets: Alfalfa-based pellets, usually 1/8–1/4 cup daily
• •Veggies: Start small, build up gradually (more details in the “step-by-step” section)
• •Vitamin C: Still needed daily

Weekly Veggie Rotation Snapshot

To avoid too much calcium, sugar, or gas, rotate veggies like this:

• •Daily staples: Bell pepper, romaine/red/green leaf lettuce, cilantro
• •A few times/week: Cucumber, zucchini, celery (small), cherry tomato, carrot (small)
• •1–2 times/week: Kale/spinach/parsley (higher calcium), fruit (tiny treat)
• •Rarely: Cruciferous veggies (broccoli, cabbage) — can be gassy for many pigs

Hay: The “Always” Food (Dental + Gut Health)

Why hay is non-negotiable

Hay should be the majority of your guinea pig’s diet. It provides:

• •Fiber to keep the gut moving and prevent GI slowdown
• •Chewing time to wear down continuously growing teeth
• •Mental enrichment (foraging and nesting behavior)

If I could fix only one thing in most pet guinea pig diets, it would be increasing hay intake and reducing pellet dependence.

Best hay types (and when to use them)

• •Timothy hay: The classic adult choice; good fiber, balanced calcium
• •Orchard grass: Softer and less pokey; great for picky pigs or humans with hay allergies
• •Meadow hay: Variety is nice—different textures encourage chewing
• •Alfalfa hay: Higher protein/calcium; best for babies, pregnant/nursing sows, or underweight pigs under vet guidance

Pro-tip: If your pig “doesn’t like hay,” it’s usually because the hay is stale, dusty, or too uniform. Try a fresh 2nd-cut orchard or timothy mix and offer it in multiple locations.

Real scenario: “My Abyssinian only eats pellets”

Abyssinians (with their rosettes and big personalities) can be stubborn. If your Abyssinian ignores hay:

• •Offer two hay types at once (timothy + orchard)
• •Put hay where they already hang out (near a hidey, in a kitchen area)
• •Reduce pellets slightly for a week (don’t starve—just rebalance)
• •Add “hay toppers”: a pinch of dried herbs like dandelion leaf or chamomile (no sugary mixes)

Veggies: The Daily Variety (Vitamin C + Hydration)

How much veggies per day?

A reliable target: ~1 cup of mixed veggies per pig per day, split into two meals. Think “salad size for a small cereal bowl.”

If your pig is new to vegetables, you’ll build up gradually (I’ll show you how).

The daily veggie template (simple and repeatable)

For one adult guinea pig, aim for:

• •1/2–3/4 cup leafy greens (romaine, green leaf, red leaf, escarole)
• •1/8–1/4 cup vitamin C veggie (bell pepper is the MVP)
• •A small add-on (cucumber slice, zucchini, small tomato wedge, cilantro)

Best daily staples (safe, practical, high-value)

These are “workhorse” veggies that fit most diets:

• •Bell pepper (any color): Excellent vitamin C, low sugar (green is lowest sugar)
• •Romaine, red leaf, green leaf lettuce: Hydration + fiber (avoid iceberg)
• •Cilantro: Many pigs love it; good variety
• •Zucchini: Gentle, low-calorie
• •Cucumber: Hydrating (not very nutrient-dense—use as part of the mix)

Higher-calcium greens (use, but don’t overdo)

Some greens are nutritious but can be too calcium-heavy if fed daily in large amounts, especially for pigs prone to urinary issues:

• •Kale
• •Spinach
• •Parsley
• •Dandelion greens

Many pigs can handle these 1–2 times per week in small portions. If your pig has a history of sludge/stones, ask your exotics vet for a tailored plan.

Pro-tip: If you see white, gritty residue where your pig pees (“urine sludge”), reduce high-calcium greens and review pellet type/portion.

Cruciferous veggies: proceed with caution

Broccoli, cauliflower, cabbage, and Brussels sprouts can cause gas. Some pigs tolerate tiny amounts, others get painful bloating quickly. If you try them:

• •Use pea-sized to thumbnail-sized portions
• •Introduce one at a time
• •Watch for a tight belly, hunched posture, or refusal to eat (those are red flags)

Fruit: treat, not a vitamin plan

Fruit is sugary. Use it as:

• •1–2 teaspoons once or twice per week
• •Examples: strawberry slice, blueberry, thin apple slice (no seeds)

If you’re using fruit to “cover” vitamin C needs, you’re likely overshooting sugar.

Pellets: Small Amount, Big Quality Difference

How many pellets?

For most healthy adults:

• •1/8 cup per pig per day of plain pellets

For babies (<6 months) and some pregnant/nursing sows:

• •1/8–1/4 cup per day (often alfalfa-based)

If your guinea pig is overweight (common in calm breeds like Teddy guinea pigs), pellets are usually the first thing to reduce while keeping hay unlimited.

What makes a pellet “good”?

Choose:

• •Plain, timothy-based pellets for adults
• •No colorful bits, seeds, nuts, or dried fruit
• •Stabilized vitamin C (still not perfect, but better)
• •Fresh bag (vitamin C degrades over time)

Avoid muesli-style mixes. Guinea pigs pick out the tasty bits and leave the fiber, leading to picky eating and nutrient imbalance.

Product recommendations (solid, widely trusted options)

These are commonly recommended by experienced owners and exotics professionals:

• •Oxbow Essentials Adult Guinea Pig (timothy-based)
• •Small Pet Select Timothy Guinea Pig Pellets
• •Sherwood Adult Guinea Pig Pellets (popular with many owners; verify fit for your pig’s needs)

For young pigs:

• •Oxbow Essentials Young Guinea Pig (alfalfa-based)

Pro-tip: Buy smaller bags more often. A huge bag stored for months loses vitamin potency and goes stale—pigs notice.

Vitamin C: The Make-or-Break Nutrient (And How to Get It Right)

Why guinea pigs need daily vitamin C

Guinea pigs can’t synthesize vitamin C, and deficiency can cause:

• •Rough coat, poor appetite
• •Sore joints/lameness
• •Slow wound healing
• •Gum issues
• •General “not quite right” behavior

Daily vitamin C targets (practical guidelines)

General ranges used in many care guides:

• •Adult maintenance: 25–50 mg/day
• •Pregnant/nursing, sick, stressed, or healing: often 50–100 mg/day (vet-guided)

Because needs vary, aim to consistently provide vitamin C-rich foods and supplement if your pig is picky, ill, or not reliably eating enough high-C veggies.

Best food source: bell pepper

Bell pepper is the easiest daily tool because it’s:

• •High in vitamin C
• •Low in sugar
• •Usually well accepted

A typical daily serving for one pig might be a couple of 1–2 inch strips (adjust to appetite and stool quality).

Supplements: what to use (and what to avoid)

Avoid vitamin C drops in water. They degrade quickly, can change water taste (pig drinks less), and dosing becomes unreliable.

Better options:

• •Chewable vitamin C tablets made for guinea pigs (given as a treat)
• •Plain vitamin C tablet (human grade) crushed and mixed with a tiny bit of water, syringe-fed if needed (especially for sick pigs)

Product-style recommendations many owners use:

• •Oxbow Natural Science Vitamin C tablets (common choice)
• •Sherwood Vitamin C tablets (also popular)

If your pig won’t eat tablets, you can:

1. Crush a measured amount of vitamin C tablet
2. Mix with a few drops of water
3. Syringe gently into the side of the mouth (slowly)

Pro-tip: If your pig is sick and not eating, don’t “hope the veggies cover it.” That’s when vitamin C and supportive feeding matter most. Call an exotics vet early.

Step-by-Step: How to Build the Daily Diet (Including Transitions)

Step 1: Set up the “hay station”

• •Use a hay rack or a big pile in a clean corner (many pigs prefer piles)
• •Add a second hay spot near a hide
• •Refresh at least once daily (top off as needed)

Step 2: Pick a simple veggie routine (AM/PM)

To keep it consistent:

• •Morning (about 1/2 cup): leafy greens + bell pepper
• •Evening (about 1/2 cup): leafy greens + small rotating add-on

Example day:

• •AM: romaine + green bell pepper + cilantro
• •PM: red leaf lettuce + zucchini + tiny carrot shaving

Step 3: Measure pellets for a week (calibration phase)

Don’t eyeball at first. Use a real measuring spoon/cup:

• •Adults: 1/8 cup
• •Babies: 1/8–1/4 cup

After 7–10 days, adjust based on:

• •Hay intake (should be strong)
• •Weight trend (use a kitchen scale)
• •Stool consistency

Step 4: If your pig is new to veggies, transition safely

New guinea pigs sometimes come from pellet-heavy setups. Sudden veggie overload can cause diarrhea.

Transition plan (typical):

1. Days 1–3: 1–2 bites of romaine + tiny bell pepper strip daily
2. Days 4–7: increase to 1/4 cup total/day
3. Week 2: increase toward 1/2 cup/day, add one new veggie at a time
4. Week 3: reach ~1 cup/day if stools remain normal

If stools soften:

• •Pause new veggies
• •Go back one step
• •Keep hay unlimited
• •Consider a vet call if diarrhea is watery or your pig is lethargic

Step 5: Weigh weekly (your early-warning system)

Use a kitchen scale (grams). Weight loss often shows up before obvious illness.

• •Healthy adults: steady or small fluctuations
• •Concerning: consistent loss week-to-week

Guinea Pig Diet Chart: Safe Veggies List (By Frequency)

Use this as your shopping and meal-planning guide. When in doubt, rotate and keep portions moderate.

Daily / Most Days (for many pigs)

• •Bell pepper (all colors)
• •Romaine, red leaf, green leaf lettuce
• •Endive/escarole
• •Cilantro
• •Zucchini
• •Cucumber
• •Small cherry tomato wedge

2–4 Times Per Week

• •Carrot (small amount; higher sugar)
• •Celery (thin slices; strings can be an issue—cut finely)
• •Basil / mint (aromatic; small amounts)
• •Green beans
• •Corn husk/silk (not the kernels; kernels are starchy)

1–2 Times Per Week (higher calcium or “richer” greens)

• •Kale
• •Spinach
• •Parsley
• •Dandelion greens

Rare / Caution (gas, sugar, or other concerns)

• •Broccoli, cabbage, cauliflower (gas risk)
• •Fruit (sugar)
• •Iceberg lettuce (too watery, low nutrition)

Pro-tip: “Natural” doesn’t automatically mean “safe.” A lot of garden plants and houseplants are dangerous—only feed known-safe produce.

Breed Examples + Real-Life Feeding Scenarios

Guinea pigs are the same species, but different breeds and personalities create different diet “problems.” Here’s how I’d handle common situations as a vet-tech-style coach.

Skinny Pig (hairless): “He’s always hungry”

Skinny pigs often burn more calories staying warm.

• •Keep hay unlimited
• •Maintain pellets at 1/8 cup, consider slightly higher if weight is low and vet agrees
• •Ensure consistent vitamin C
• •Use cozy bedding and safe warmth to reduce calorie drain
• •Track weight weekly (or twice weekly during cold months)

Peruvian (long-haired): “Poop gets stuck in the fur”

Long-haired breeds can get messy around the rear.

• •Keep veggies high-fiber, low-sugar
• •Avoid overfeeding fruit and sugary treats
• •Consider trimming the rear hair (“sanitary trim”) so you can monitor stool quality
• •A stable diet (hay + measured pellets + consistent greens) often improves stool consistency

Teddy / American: “She’s getting chunky”

Many short-haired pigs are easy keepers.

• •Reduce pellets to 1 tablespoon–1/8 cup depending on size and vet guidance
• •Increase activity: larger enclosure, floor time, scatter hay piles
• •Don’t reduce hay—hay is not the weight problem

Senior guinea pig (5+ years): “He’s slowing down and picky”

Older pigs may have dental wear or pain.

• •Prioritize easy-to-chew greens (but still offer hay)
• •Offer multiple hay textures (orchard can be easier)
• •If hay intake drops, get a dental exam—don’t just add more pellets
• •Discuss vitamin C and pain management with your exotics vet if appetite is changing

Common Mistakes (And What To Do Instead)

Mistake 1: Too many pellets, not enough hay

Problem: Reduced chewing = dental issues; reduced fiber = gut slowdown Fix: Measure pellets; make hay more appealing (fresh, varied, multiple stations)

Mistake 2: Vitamin C in water

Problem: Unreliable dosing + pig may drink less Fix: Use bell pepper daily and/or a chewable tablet or direct dosing

Mistake 3: Overdoing “healthy” greens like kale every day

Problem: Too much calcium for some pigs, urinary sludge risk Fix: Rotate greens; keep higher-calcium items to 1–2 times/week

Mistake 4: Sudden diet changes

Problem: Diarrhea, refusal to eat, gut upset Fix: Transition gradually; introduce one new veggie at a time

Mistake 5: Feeding seed/nut mixes or “treat sticks”

Problem: Sugar/fat imbalance, selective feeding, choking risk Fix: Plain pellets + veggies + hay; use tiny fruit as rare treat

Expert Tips: Make the Diet Easy, Consistent, and Safe

Use a “salad formula” so you never overthink it

For one pig:

• •Base greens (2–3 types): 1/2–3/4 cup
• •Vitamin C veg: bell pepper strip(s)
• •Rotating add-on: cucumber/zucchini/tomato/cilantro
• •Optional 1–2x/week: small parsley/kale “booster”

Store produce to keep it crisp (pigs notice freshness)

• •Wash and dry greens well
• •Store in a container with paper towel to manage moisture
• •Toss slimy greens immediately—spoiled produce can upset the gut

Compare feeding styles: “All at once” vs “twice daily”

• •Twice daily feeding helps stabilize appetite and reduces begging behavior
• •All at once can work if your schedule demands it, but watch for pigs that eat everything immediately and then act “starved” (they should always have hay)

Signs your diet is working (simple checkpoints)

• •Strong hay interest throughout the day
• •Firm, oval droppings (lots of them—normal!)
• •Stable weight
• •Bright eyes, active behavior
• •Smooth coat (or healthy skin in hairless breeds)

Quick-Reference Guinea Pig Diet Chart (Printable Style)

Adult Guinea Pig (per pig, per day)

• •Hay: Unlimited grass hay (timothy/orchard/meadow)
• •Veggies: ~1 cup total (split AM/PM)
• •Daily: leafy greens + bell pepper
• •Rotate add-ons through the week
• •Pellets: 1/8 cup plain timothy-based
• •Vitamin C: 25–50 mg/day (from bell pepper + supplement if needed)
• •Treats: Fruit 1–2 tsp, 1–2x/week max

Baby Guinea Pig (<6 months)

• •Hay: Unlimited; include alfalfa
• •Pellets: Alfalfa-based, 1/8–1/4 cup
• •Veggies: Start small, build up gradually
• •Vitamin C: daily (food + supplement if needed)

FAQs: Practical Questions I Hear All the Time

“Can I feed only pellets if they’re fortified?”

Not ideal. Pellets alone don’t provide the long chewing time and high fiber that hay does. They also don’t replace the hydration and variety of fresh veg.

“Is lettuce bad for guinea pigs?”

Some lettuce is great. Romaine, red leaf, and green leaf are common staples. Avoid iceberg (too watery, low nutrient).

“How do I know if my pig needs a vitamin C supplement?”

If your pig reliably eats bell pepper and vitamin C-rich greens daily, supplementation may not be necessary. If your pig is picky, ill, stressed, older, or not eating well, a measured supplement is often a smart safety net—especially during recovery.

“My guinea pig has soft poop—what should I change first?”

First: keep hay unlimited and ensure water access. Then:

• •Reduce watery veggies (too much cucumber) and sugary items (fruit/carrot)
• •Pause new vegetables
• •If diarrhea is watery, your pig is lethargic, or appetite drops: call an exotics vet quickly

If You Want, I’ll Build a Custom Guinea Pig Diet Chart for Your Exact Pet

Tell me:

• •Age (baby/adult/senior), weight, and breed (or best guess)
• •Any history of bladder sludge/stones, bloat, or dental issues
• •What they currently eat (hay type, pellet brand, veggies, treats)

And I’ll create a 7-day rotating guinea pig diet chart with shopping list, portions, and a vitamin C plan tailored to your situation.