We have first hand experience with abscesses. our older cat now hates our newest cat and has attacked her several times. the last time he left two wounds that abscessed that cost hundreds of dollars for treatments. She is recovering well but is afraid to come out of our bedroom. She is also skittish around the other cats.
That's not good. Why not put the whole household on calming treatments, it does often help them to get along better and saves on those bills