I completely understand what you are going through and wish I could help. My puppy is almost 6 months old and has had a terrible rash from about
2 months old. She chews on herself until she bleads and itches non-stop 24-7. She has been to the vet about 7 times and was given medication and lotions everytime that did not seem to help. We have tried changing her food, lotions, shampoos, taken out trees and plants in the yard, tested her for mange, skin tested, etc. It's just a nightmare for her and us both. We are so frustrated and it makes us so sad when she walks around the house yelping and scratching. We have spent a total of 2500.00 on this rash so far and are monitarily drained. We are not giving up.
We tried the benadryl thing for about a month and all it did was make her sleepy and didn't help with the itching or with the rash. We tried the plastic cone around her head and put Neosporin with pain medication all over her and it seemed to make the bumps scab up like they were going to go away. Unfortunately we could only do that for the weekend as she could not get out the doggie door on monday when we had to return to work. I am in the same boat as you and would love to hear any information or suggestions that anyone has. I will also keep you updated on things we have tried.
I also wanted to know if anyone has heard of a dog being allergic to themselves. I was told by a friend at work that she had to put her dog down for this reason and wondered if anyone had any thoughts or info.