This is what I do

[Willow Oak]

Gosh, $270!! That is expensive! Any chance you could make a deal with your vet and get it cheaper, since you have so many animals? Or perhaps get it from another place.

I was lucky a while ago, my vet had some Advantage that was just out of date, I got that for less than half the price.

I bought the Frontline at a Petco. I don't want to embarrass anyone, but the locals can't sell it ..., well that's another story. The vet gives me a huge break on other services though, fortunately.

I buy the large dog size -- usually about four boxes. I split that up among the dogs and cats.