Dry/Kibble

This is typically the least costly, with a long shelf life. But it may be slightly less digestible, says Joseph Wakshlag, a professor at the Cornell University College of Veterinary Medicine.

Wet/Canned

It’s a bit more expensive than kibble and has a long shelf life. But canned food may cause more plaque buildup than dry food, which can lead to dental problems.

Fresh

Michael Q. Bailey, president of the American Veterinary Medical Association, says this is similar to human food. But it’s more expensive than even high-end kibble.

Freeze-dried

This growing category comes in gently cooked or raw varieties. Vets say the cooked kind will ensure elimination of harmful bacteria and organisms.

Raw

This food is palatable and digestible. But it’s often expensive, and vets typically don’t recommend it because of risk of disease. —Julie Halpert