Join Date: Mar 2010
Location: Ontario, Canada
That happens every time I take one of my girls to the vet. In fact, whenever possible, I now always take them to the vet together, to avoid that very problem.
It happened three times in the past 18 months, each time Muffs went to the vet and, when she came home, Abby sniffed her and hissed. It's almost like Abby was saying "You're not the REAL Muffs. You don't smell like Muffs. You're an imposter Muffs, and I don't like you!"
When it happens, I try to distract Abby as much as possible and to play with the two of them as much as I can. I separate them overnight and when I'm at work. I also keep a coin can handy and shake it behind my back if I think things are escalating too far. I tried the vanilla trick, but it didn't work for me...still it might work for you, so it's worth a shot. Each time, the hissing continued for a few days, but thereafter they were back to normal again, cuddling together and grooming each other. So, not to worry, this too shall pass.