I lost that female Boxer that had the IMHA to food related DCM when she was 7 it was especially heartbreaking because once we got thru the IMHA she returned to full health was happy and fun loving dog. It took I think 3 months maybe 4 before she regained her health and strength back. I thank goodness she never got those prednisone side effects but I was really worried giving her those large doses. her blood count on the onset was at near death numbers so it took her a long time it seemed for her numbers to come up spent a lot of sleepless nights and a whole lot of tears, she was one of the best dogs I had ever had too. I am so sorry to hear your dog relapsed with this sounds like the steroids are really hard on him. Hopefully he is not going to be needing steroids anymore! I wonder if that ear pain has anything to do with the sores he had in his mouth? Kudos to you for helping a dog in need. My first Boxer was a product of a back yard breeder in horrible condition when I brought her home but some wormings and good food she came around, her temperament was never the best by no means a friendly Boxer but she was the longest lived dog I have had she made it to 13 so I don’t think the bad start affects them too much, and coincidentally she was the healthiest of any other Boxer that I had afterwards never needed the Vet for anything but routine stuff! On the fear issue I’m sure she will improve maybe make sure your partner is the one to treat her and spend time playing with her till she understands good things happen when she sees him. After my bout with IMHA I view getting vaccines differently now. Which allergy med do you think did this? If you want private message me, I had a run in with the more popular advertised med with gastric issues.