HELP! I normally don't post or ask for opinion unless it is of a dire situation. My cat Mason is prone and susceptible for hairballs. He is on Laxatone on special hairball wet food and absolutely HATES to be groomed/brushed (despite several attempts with positive reinforcement and different brands of brushes). My boyfriend and I are leaving on an Alaskan cruise in 4 days and to prevent potential intestinal blockages from hairballs (had a friend who's cat died from a hairball obstruction), I had Mason sedated and he got a medical groom through the vet clinic (he was also matted). When he returned from the vet, the female cat, Kiki growled, hissed and swatted at him after a thorough sniff of him! I've investigated online and tried to do the towel rub AND vanilla rub (imitation vanilla as I didn't have the actual vanilla) and none of it has worked. She still growls and hisses when she sees him. Not sure what else to do and now that I'm leaving for my trip in 4 days, I'm in desperate mode. I'm trying to do gradual re-introductions but its tough when I live in a one bedroom apartment. Does anyone else have any other ideas? It's such a shame since they are not litter mates but have lived with one another since they were both 8 weeks old for 5 years and have never been aggressive towards one another!