Our Aussies take Sentinel (for flea and heartworm) plus during the summer months they also take Comfortis. Yes, TX has the fleas too! What we do is Sentinel on the first of the month and then Comfortis on the 15th. They have always done well on the combination. Tatum (Yorkie) did the combination a couple years ago but only needed the Sentinel last summer. But as I understand it they both work in different ways and since Tatum seems to be allergic to flea bites, we may give her Comfortis this summer too. Poor thing, I know the fleas die when they bite but by then it's too late for her because the bites make her itch so much.
Sorry I can't help with the Trifexis issues as we've never tried it. Sentinel has always been great for us. We just have to have that extra boost with Comfortis because fleas are a serious issue in our area (and worse yet with us living in the country).
__________________
~ Angie |