Essential fatty acids (EFAs)

1 teaspoon­1 tablespoon poured over food
Rationale: EFAs contain vitamins A and E and promote healthy coat and skin.
Notes: This supplement comes in liquid form or as gel tablets; follow package directions.

Folic acid

200­400 mcg/day
Rationale: This B vitamin is essential for red blood cell development and maintenance, and for the nervous system.
Notes: Commonly available in capsule form. In supplemented pet foods that have been stored for long periods of time, folic acid may have decreased potency.

Glucosamine and chondroitin

500 mg glucosamine, 400 mg chondroitin for dogs; half that amount for cats
Notes: These supplements may help promote healthy joints.
Rationale: You can break up pills into the pet's food. Some pet supplements come in treat form; follow package directions.

Vitamin C

1 pinch (about 250 mg), added to food
Notes: Antioxidants support the immune system.
Rationale: Powdered vitamin C is easiest to use.

Sources: Roger Valentine, DVM, Pet Allergy Center, Santa Monica, California.

*Always check with your vet before starting your animal on any herb or supplementation program.