Old Boober rat and Young Slugo rat are having a sniff and greet. So far the boys are getting along.
Boober at first seemed to not really care either way about Slugo but eventually offered some grooming which Slugo appeared to enjoy. Slugo would frequently slip underneath Boobers head in order to get more attention.
It's a good start. Slugo wants a buddy and Boober does not mind being the big brother.