My nearly one year old black and white boy came to me at four months old having been rescued with his mum and siblings as a baby. He was a cuddly affectionate kitten but for around the last month or so he has changed a lot. He doesn't purr as much as he used to, not nearly as cuddly and since I got some feliway last week to see if that would help he has started sleeping in his own bed instead of on mine. He still loves playing and is eating normally. Do cats go through some kind of stroppy teenage phase or should I be more concerned?