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Dairy
Can Guinea Pigs Eat Milk?
Causes digestive upset in most pets
Quick Answer
Not recommended — milk is not suitable for guinea pigs. Despite stereotypes, most adult dogs and cats are lactose intolerant.
Reviewed by Clawmate Vet Team•Updated February 2026
🐹Specifically for Guinea Pigs
Guinea pigs cannot digest lactose. Never offer milk.
The Full Story
Puppies and kittens produce lactase to digest mother's milk, but most adult pets lose this ability. Cow's milk can cause digestive upset, diarrhea, and stomach pain. Water is always the best beverage for pets. If your pet enjoys dairy, try lactose-free pet milk products.
⚠️ Important Warnings
- Most adult pets are lactose intolerant
- Can cause diarrhea and upset stomach
- Special pet milk products exist
- Water is always best
Frequently Asked Questions
Can guinea pigs eat milk?▼
Causes digestive upset in most pets. Despite stereotypes, most adult dogs and cats are lactose intolerant. Guinea pigs cannot digest lactose. Never offer milk.
Is milk safe for guinea pigs?▼
Puppies and kittens produce lactase to digest mother's milk, but most adult pets lose this ability. Cow's milk can cause digestive upset, diarrhea, and stomach pain. Water is always the best beverage for pets. If your pet enjoys dairy, try lactose-free pet milk products.
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Trusted sources: ASPCA Poison Control · Pet Poison Helpline · AVMA Pet Owners