When I would board Bobo at the vets (we had a pet sitter come in for the others but Bobo had heart issues so I preferred he was more closely monitored and medicated), he would go with his bag packed with all sorts of things including toys. When they had a break in cases, he'd get to come out of the cage and play with them.... I also packed more "normal" items such as a familiar pet bed and his food. I'm sure it was unusual but then I've rarely been accused of being normal ;-)