suggestions for angry cat help

I had to take one of my three cats to the vet yesterday. Well both were angry when Jasmine came back. After a few hours of listening to them hiss at Jasmine every time she got close, I thought I would try the sock trick. It worked on one of the cats, Gypsy is still angry as ever & she even hissed at me this morning & then ran off. I don't know what else to try, I was thinking some feliway but that really doesn't stop them from hissing at each other.

This happens EVERY single time someone goes to the vet, it's always Gypsy that takes the longest to calm down. In the past I've tried rubbing their favorite blanket over all of them, putting Gypsy in the carrier that the other cat was in, using one of my worn t-shirts to rub on them. I can't think of anything else at the moment.

Any suggestions you have I will try! thanks

Hi, I read an article on this problem the other day, I had no idea this problem was so common!

Anyway, It's basically the re- introduction technique. I hope this helps.  

thanks, yes it is helpful.