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Pet Dilated Pupils: Causes & Toxicity Warning
Persistently dilated pupils — especially with confusion or stumbling — can indicate marijuana, antihistamine, or chocolate toxicity.
Severity: severe
Same-day visit. Be honest with the vet about any household substances.
Understanding dilated pupils
Cats' pupils naturally dilate in low light, but should constrict in bright light. Failure to do so is concerning.
Home care
Keep the pet in a quiet, dim room until evaluated.
Emergency contacts
ASPCA Animal Poison Control: 888-426-4435
Pet Poison Helpline: 855-764-7661
Both are 24/7 — small consultation fee may apply.
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