In the future I plan to adopt a rat from a local shelter. Right now I have two rats. I will be sure to ask about their quarantine procedures, but I'm wondering if I would still need to be worried about diseases like sendai. From my understanding this disease and others like it only show symptoms for a couple of weeks shortly after exposure, so I'm wondering if there anyway to know for sure that another rat is safe, do shelters test for these diseases? I would not be able to quarantine any new rat home because my living space is small, so I would need to have total confidence that any rat I get is healthy. I have read through this article already https://www.ratshackforum.com/threads/thinking-of-getting-a-rat-things-to-consider.32306/ but Im still confused about this aspect of adoption. Thanks!