[aweitzm1]

I buy the largest Frontline dosage and break it up for my dogs. Usually will last me about 9 months. Much cheaper. My vet even recommended I do this. I don't break it up by weight but by dosage on the packages. For instance, the small dog dosage of frontline is .67 ml. I take a 1 ml syringe and give the dosage that way. Since my dogs are well under the 25 pound limit I give them a little less around 6 ml dosage. I have never had a problem with this. I store the remaining medicine in a 5 ml vile.