If you think your cat has consumed any toxic food to felines, or you saw your cat eating something poisonous, immediately call your personal vet for an appointment or any other vet close to your residence if your cat has ingested a big amount of a harmful substance or food.
If your vet is out of working hours, you can call the ASPCA 24/7 Animal Poison Control Center at phone (888) 426-4435 at any time in case your local vet doesn’t do emergency calls or the Pet Poison Helpline at 855-764-7661, but be prepared as a consultation fee of 65$ might apply.