I was wondering how fast Sentinel (heartworm preventive) is absorbed. Calvin had his (with dinner) at 6:30pm, and just vomited at 11:30pm. It didn't look like he threw up his dinner, it was mostly liquid (he drank alot of water after playtime tonight), and maybe some treats that were in his kong. I wasn't sure if I need to re-dose him, or if he's covered
