
This sounds awful for your boy, have you thought about natural remedies or homeopathy? Steroids and other medicines from vets do have a place but somehow I think your boy needs a more natural treatment. Neem products are brilliant for skin, have a look at www.neemgenie.co.uk
Steroids will also make your boy HUNGRY that is why people and animals on long term steroids will put weight on and probably why your boy is searching for food.
Your boy sounds so uncomfortable, please do try natural remedies rather than the drugs and chemicals which can exacerbate the problem.
I see you feed him a raw diet which is good. Because he has had lots of steroids and antibiotics his immune system will be shot at, so he needs that boosting, try some natural yoghurt, great for yeast infections, and also try colloidal silver to bathe his sore skin and as I mentioned above, some neem products. Echinacea is good to boost the immune system and so is vitamin C and E for his skin. Please try the more natural rather than chemical remedies for your boys sake. There are homeopathic vets which can help:
http://www.bahvs.com/I have just noticed that his diet contains pork which is not the best raw meat for dogs, you will be better sticking to chicken and lamb, a small amount of offal per week and fruit and veg, cottage cheese, and only a small amount of fish.
Good luck with your boy, I am sure with time, and patience you will get him through this. But please do not get angry with his behaviour, remember drugs do make people and dogs behave differently.
Also add pineapple to his fruit and veg which should stop him eating his poo