This Hartz flea treatment is crap !!! I would rather my dog have fleas then to have tremors and be lethargic! I put those drops on my maltese/poodle mix baby and now she is at the vet! About an hour after I placed the treatment on her she becamse lethargic, would not move and shaking all over ! I bathed her twice and she still is out of it. Hartz needs to pay my Vet bill ! I just pray she is going to be ok. This is ridiculous. They shouldn’t be allowed to sell this crap in any store. DO NOT BUT THIS STUFF ! It’s not worth your pets health and lives.