Does anybody here know about skin diseases in miniature poodles?

I am considering adopting a miniature poodle from a local no-kill shelter. She's very malnourished and she's an old dog - all of this is fine and I'm financially prepared for it - but she appears to have skin problems. It's not ringworm or flea-related...I know those problems on sight. Her skin is not crusty or smelly or covered in sores. It's just a sort of general inflammation. The shelter is so strapped for cash right now that it won't do any diagnostics on adult dogs except heartworm before adopting them out, so I won't know what it is until I take her to the vet myself. I'm probably going to adopt her anyway, but I'm just curious if there are any poodle lovers out in Yahooland who know what I might be looking at, here. Thanks in advance!