They just got it FDA approval for use in cats, I imagine they are repackaging The cats will take same pills, but the weight range is different. Typical cat 8-12 pounds, will take a 10.1 - 20 pound dog, I believe.
or could it be that trifexis is a big disappointment and this is a desperate attempt to force our hands to try to get trifexis on our shelves. its pretty sad when the vca down the street still has no problem getting their acuguard