i was going to ask you that earlier.. if it was because he may he infected by something at the vets office.. personally i wouldn't worry to much about it.. since he has cage mates and you decided to quarintine him for lets say 3 months.. he might or the others might not want to share a cage anymore...vets are pretty sanitary places and leos are pretty hardy.. my sister works in a vets office and i asked her and she said if he is just going into exam room and not in the back with other dogs, cats, birds, reptiles etc... you really don't have a ton to worry about.. but there is always a slim chance he could catch something and ruin the rest of your leos.. but i think it is very slim...jmo though do whatever you feel is best..
alissa
-----
2.2 chinese water dragons
1.2 bearded dragons
0.2.1 leopard geckos
1 african clawed frog, 1 african dwarf frog, 1 california newt
1.4 english setters
2.2 breeder mice
tons of fish