Flea Control & Advantage

SkyCaptain

I have a supply of Advantage for Cats under 9lbs, but recently had two more cats added to the mix and they are over 9lbs. The amount of liquid in each package of Orange (<9) is 0.4mL while the liquid in Purple (>9) is 0.8mL. Would I be able to use two Orange packages on each of the new cats?

Pel

Can't speak for Advantage and IANAV but with Advantix the mix per ml seems to be the same and this sort of thing works. On the other hand, its much much cheaper to buy the larger size than 2 of the smaller size so keep that in mind.

Hevach

I'd call a vet and ask first, just in case the dilutions are different. Cats are hypersensitive to any kind of toxic exposure. They can die from an overdose of the stuff (or if you try to use dog flea removers on them). It might be fine, but I really would hate to see you take advice on the internet and have sick cats on your hands because of it.

Trillian

It's really easy to underdose on advantage, but very very hard to overdose (as in logically impossible). Hell, I know someone that FED advantage to her cat and it was unhappy, but it did not get sick. You could put 2 doses on each of the larger cats, but what I'd suggest is using 3, and splitting the 3rd dose between the 2 cats. We do this all the time at my dad's vet clinic - someone will have a house full of different sized animals, so they'll buy the largest size and use one tube for the whole menagerie (we recommend this for people we like). The only difference between the different sizes of Advantage is the amount of goo in the tube. It's waaay cheaper to buy a big size and portion it out than to buy them all individually.

SkyCaptain

Thanks all. The only reason I ask is because I have enough for a 5 month supply for two cats and added two more cats, but the flea problem is coming back because they aren't treated yet.