My husbands cousin has a new baby and also has two British short-haired cats. Percy is nonplussed by the new arrival but Cyril is being very naughty. He is destroying the babies toys and has now started to try and mark the baby as his territory. She could really do with some advice as to how to settle the situation down. She adores her cats and obviously their new baby and wants it to be as harmonious as possible. Any tips or suggestions would be appreciated.