Purring (means content.) Even sleeping curled up is a sign or laying sprawled out across the back of the couch looking out the window. Cats are generally very laid back and content. They play, eat well (grazing) and drink water. If your cat is ill they will either cling to their owner or go off into another room to have peace and quiet. Older cats that become ill can have a scraggly coat of fur. If in doubt see your vet.