Well I have started the process of introducing my young rat (Crowley) to my older male (Jacoby) since they r both due to get fixed as soon as I find a vet who will do it near me I decided to start the process by putting there cages by each other well my issue is my older rat ignored the other one 100% while the younger 1 sniffed and watched the older I was wondering if this is normal? Neither are showing signs of aggression so I guess that's good but I was confused since everything I read says move on to the next step when all signs of aggression stop