If the pet is not showing any additional signs of sickness, a vet should still be seen in order to make sure the pet has not been harmed. If a vet is not available and there is a suspicion that the pet is poisoned, give it fresh water and lay it down. The number for the ASPCA Animal Poison Control Center is (888) 426-4435. They charge a small fee for consultation but offer helpful advice.
Bowls of Wet and Dry Pet Food
If someone has a recalled bag of pet food, he or she can usually take it back to the pet store for full or partial refund. If it was opened or if it was consumed by any pets, take the pets to the vet for further examination or call the local vet for further advice. For pet food handling tips, go to the FDA Pet Food Handling Tips.
Bowl of Pet Food
Cat Food

External Links
Sources:

Animal Protection Institute

AVMA Pet Food Recalls

Pet Food Recalls: The Solution
Test Your Knowledge!

If the pet is not showing any additional signs of sickness it should be seen by a ___.

A. Vetenarian

B. Doctor

C. Specialist