Toxicity level
MildModerateSevere
- Earthworms can carry parasites
- Varies
- Affects: Gut (parasites)
Did you know? Earthworms aren't toxic but can carry lungworm — worth a vet's parasite advice.
Verdict
Feed only in moderation
Species
🐱 Cats
Why this verdict for cats
Earthworms are low-risk if eaten, but they can carry parasites. Watch for tummy upset and ask your vet about deworming.
Warning signs to watch for
- Mild vomiting
- Diarrhea
🍽️ Feeding it safely?
Frequently asked questions
Can cats eat worms (earthworms)?
In moderation. Earthworms are low-risk if eaten, but they can carry parasites. Watch for tummy upset and ask your vet about deworming.
How much worms (earthworms) can cats have?
None — worms (earthworms) is not safe for cats and should be avoided entirely. When in doubt, ask your vet.
Is worms (earthworms) safe for dogs too?
Verdicts can differ between species. See the dog answer for worms (earthworms) →
More bugs & critters for cats
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated June 22, 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List
CanMyPet provides general information reviewed against trusted sources (ASPCA, AKC, Pet Poison Helpline). It is not a substitute for professional veterinary advice. When in doubt, always contact your veterinarian.