Hello experienced members,
Im thinking about starting my gsd 6 months old on comfortis because Advantage II stopped working for me. My situation is that every weekend I bring my dog to go to my boyfriends house ( he has 4 dogs ) and his house and dogs has a mild flea infestation which is really difficult to get rid of and I think they've given up. Initially advantage II was working on my gsd but 2 weeks later the effectiveness weakened and my dog developed severe allergy to the flea bites. So now my question is if I put my dog on comfortis, will it help him while he is staying at my bfs house over the weekend? Please let me know. Thanks.
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