I used to use comfortis, but Huey has been on trifexis for about 1 1/2 years. He never had any problem with the comfortis; it was just cheaper to have him on the combo pill instead of one for fleas and one for heartworms. He is mostly an inside dog, but I didn't want to take the chance of him getting fleas and there is no way I'm putting that greasy frontline on my pretty dog! The trifexis seems to be great. We even went to the beach and he didn't get sand fleas, either. |