Cat hissing at her brother after his surgery
My male cat was just in a vet hospital for a few days having his bladder unblocked (for the first time, he's only 3 and a half, poor guy). He's home and doing well now but is on some medications for a few more days.
However, his sister seems to have a problem with him - she keeps hissing and growling when he's near and has swatted at him a couple of times.
They've never really been apart before this and while they've gotten less snuggly over the years they've always been friends.
Is it just because his mouth and face smell weird from the medicine? Will she calm down when he stops taking it? Is there anything I can do to help her be ok? Obviously it stresses him out a little to be hissed at which is now what he needs right now!