Hi musician8 and welcome to this forum .....
So sorry you are having some issues with your BAHA. I have had my Oticon Medical Ponto (bone anchored hearing system) for 7 years and am overall very pleased with the results.
First of all, no hearing aid or device will restore your hearing to what your normal, healthy ear was. That being said, we do have good options these days for assistance to closer to normal hearing. Since hearing is a really a brain perception thing, it takes the brain a while to adjust to input only from one side (the BAHA, as you know, sends sounds from your deaf side to your hearing side).
It sounds to me like you need to go back to your audiologist for tweaking of the settings if you are getting feedback from a dog barking.
I have three settings on my Ponto: one for normal every day use, one for music (which I love for concerts, etc.), and one for Telecoil (where available). A trick I have used in noisy spaces to hear speech, is to cup my hand behind my hearing ear. That seems to focus the desired sound better.
As for the crusting around the abutment, as I am sure you know, it is important to keep it clean and dry. At the first sign of any pain or crusting around my abutment, I clean it with either hydrogen peroxide or an alcohol pad (too frequent use of either of those, however, can result in drying the skin too much). If it begins to crust a lot before I can get to it, I use a tiny dab of Neosporin around it overnight and it has always cleared it up.
Always check with your doctor and/or audiologist regarding issues with it for their recommendations.
Best wishes, Clarice