Because if a vet knows it's safe and effective, they'll use some products off-label. My exotics vet told me I could use Advantage on my ferret, for example.so comfirtis just got approved for cats? THEN WHY DID MY VET GIVE MY CAT THAT IN 2011 gosh some vets sorry
And, yup, I looked it up, and it was approved for cats in August 2012.