Welcome aboard. I hope you continue to find some support here.
It's wonderful that you have such a supportive husband. You shouldn't think of yourself as a burden. Your husband is only doing what any loving spouse would do and wouldn't you do the same for him if the shoe were on the other foot? I think that it is wonderful though that you see what he goes through as well. It's like a give and take where you both can see what the other goes through and can be supportive of one another in my opinion. That helps tremendously.
I'm sorry for what happened to your son's dog. I would be scared after that incident too. You have to do what you can to protect your dogs from possible injury, so in my opinion you are doing a good thing for them. They're lucky to have you.
Most people get denied for SSI the first time around and have to appeal. I wish you well with that. It shouldn't be a problem if your pdoc sends in his paperwork with his diagnosis and statement about not wanting you to work. Make sure he's done that and that you've included a copy along with your paperwork.
Hope you have a better day