Cushing's Syndrome cause by Cereal Grains (and/or Sugar)?

The dog of my mother has Cushing's – probably, we need to do more tests. Anyhow, the dog has a lot of problems, which may or may not be connected to Cushing's:

• (Probably) Cushing's, thin legs, bigger stomach
• Muscle problems: weakness, (temporary) limbing
• Fatigued
• Liver problems (I swear, he hasn't been drinking)
• Cataract
• Hearing problems
• Probably a few other small things

Now, the only things wrong in his nutrition were Cereal Grains and Sugar. No dairy that I know of. His nutrition contained probably some seed oil, but I don't know what. Possibly some chicken egg through noodles.

As his condition worsned, and the dog started limping, and dragging one hind-leg, we had to do something. The doctor first suspected arthitis, and the dog got anti-inflamatory medication and anti-pain medication. I changed the dogs diet at the same time and removed cereal grains and sugar for his diet. The result was that he improved somewhat.

Next he got anti-biotics and again anti-pain medicaiton. The dog improved again somewhat. I started giving the dog more carbs (rice and potatoes). The combination of anti-biotics and carbs seems to have done some help.

Now he is off the anti-biotics, and got less carbs, and the dog is more fatigued again.

Now, it is difficult to say whether the dog improved due to the medication, or due to the change in nutrition. But I'll be damned if cereal grains and sugar are not bad for dogs.

We'll keep looking. 

Let's see, this week the dog get another test, and then maybe some medication for Cushing's. It is really sad to see the dog like that, but at least it improved noticeably over the last weeks.