Hey there! I'm wondering if anyone could share their thoughts on whether I should re-dose Dutch for flea/heartworm/tick etc prevention. Dutch was due today for his 3rd round of Trifexis, so I picked it up at the vet, and gave it to him between 4-4:30pm, then I fed him shortly after that. At about 6:30pm, Dutch started to get a wee bit agitated and then vomited all over the floor.....A LOT....then about 5 minutes later, he vomited again. This is the 3rd time he has received Trifexis, but the 1st time he has had any major issue from it, however, now that I read up a bit more about it, I think I will be switching him to Revolution instead. Anyways, I called my vet to let them know, and they are recommending I bring him in on Monday to redose him with a different flea/heartworm etc control.....namely Sentinel. My question is.....would 2 hours not be enough time for the Trifexis to be into his system?? The Trifexis website says that if a dog vomits within an hour after taking the pill, then you should redose....but Dutch was a little more than 2 hours after. I want to make sure he's protected, but I also don't want to re-dose if I don't have too. What are your thoughts.