As nice as it is, how are people not outraged that they were locked up for 30 years in the first place?
how do you think lab animals live, exactly? they aren't free-range, and not just because scientists hate animals, but that it screws with the controls of the experiment. I was surprised to see that their indoor playpen was as nice as it was, although it wasn't clear that they'd always had access to that.
Re: the hugging, I'm not sure that they were hugging, at least in the way humans do, implying affection and joy. That could have meant a lot of other things, like aggression toward a lower-ranking member, a fear reaction to an environment they'd never encountered, or just animals goofing around. It's nice to imagine that elation would be the first response from a creature that had never seen the sun or outdoors, but apprehension and fear might be more likely, imo.
Everybody good, plenty of slaves for my robot colony?