Thrush as symptom of Cushings?


--Is thrush sometimes a symptom of PPID?  I have a 32 year old horse that I am beginning to suspect has Cushings.  I have held off testing him because he has no other obvious symptoms, but I am beginning to wonder if his tendencies toward thrush may not just be my poor attention to cleaning his feet. 

I know that there are a lot of miscellaneous issues in PPID horses related to lowered immunity.  Could  a predisposition to thrush be one of them?  
Gail Russell 8/30/2008 .

Eleanor Kellon, VMD

Many factors contribute to thrush and age alone impairs immunity. If you want to know if he has PPID, get him tested.
Eleanor in PA 
EC Owner 2001