I have just transfered my ferret to my new apartment building (My mom was NOT taking care of him at all)

Anyway, I have the same cage (all cleaned of course) and I notice now that his nose, eyes, and ears are red. His eyes are watery too. I have not seen this on him before. Can anyone help?

His diet has been the same, his kitty litter has been the same and his bedding has been the same material (just replaced).

I also witnessed him drinking his pee right after he went (I keep his water fresh, so I don't know what that was about either) Could that have done it?

His poop has been some what liquidy (about a quarter is different from the rest)

Can they overheat too? It has been hot and muggy lately. 81 degrees..

Anymore info needed, ask.