I adopted my cat (male 1 year) and kitten (female (8 weeks) from the adoption center. Although they were never kept in the same cage, as soon as they got home they were great "friends" to the exclusion of my other cat (female 8 months). Is it possible they "knew" each other from the adoption center? These two continue to sleep together, cuddle and bathe each other today. They do pay more attention to the third cat, but it's never quite the same. They are both spayed/neutered. Does he think he's the dad or big brother? What's up?