I would say Frontline Plus. My vet here sells them individually if you don't want to get all three or six months, you could try that. But just to make sure, I would give them two months to get rid of the ticks since people are saying it doesn't work that well. I would definitely try calling the vet and asking what flea and tick shampoo they would reccomend. Definitely not Heartz product, that did absolutely nothing for Honda. Other than that, I don't really know what to tell you. Although I did read an e-mail about using a cotton ball and liquid dish soap and it sucks the creatures from right out under the skin. That is just if you need help getting them off. I don't know if it really works, but a couple people said it did.