I'm a veterinarian... so read this with that in mind
Dogs actually get this fairly often. It is an overactive adrenal gland (hyperadrenocortisim) either due directly to the adrenal gland itself, or to the pituitary gland being overactive and telling the adrenal gland to make more steroids in the body than necessary. Usually it causes increased drinking and urination, weight gain (or perceived wt gain), weakening of muscles -- in dogs we get a "pot belly" effect because the abdominal muscles weaken and can no longer support the abdominal contents, so they hang lower. It can cause thinning hair and thickened, hyperpigmented skin as well as really thin skin. It can also be a result of long term steroid use such as for allergic problems, or immune-mediated diseases.
Here is link to a website with basic (human) information... I'm sure you've already done a search, but in case you missed one!
Good luck with whatever you find out.HTML Code:http://www.webmd.com/a-to-z-guides/cushings-syndrome-treatment-overview



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It's a funny idea, though. Maybe I should go to a vet for this! He said it was probably nothing, but he was concerned and thought I should just get a test for it. I'm getting caught up on my other doctor/dentist appointments that are long overdue, so I'll be going to the endocrinologist in the next couple of months. I had no idea that dogs got it so frequently!

