girl is 7 months old, he is 9 months old, they arent bro/sis, were palced together to see how they got on on friday night, got on famously, we bought them sat night and seem to have settled in well, but he keeps trying to piggy back her! (she has been spayed)..when hes not trying they snuggle together ALL the time, washing eachother, he hides behind her if he doesnt want to come out, she sticks her paws and nose through the hutch when ive got him out and shes still in...so how am i going to make sure theyre both ok firstly tomorrow when hes gone all day at vets and then for however long afterwards while theyre in separate(one above other double hutch) hutches ..TIA