Yeah I am pretty sure if you are married it doesn't matter who paid for the house initially, you can't just change the locks and lock someone else out.
OP I'm sorry this is tough. What do you think would happen if you left and left the dogs with him temporarily? I understand not wanting to leave but if he won't your only options are to live together or leave.
I'm so sorry lightyears. I have no idea how to help. Do you have a plan for after you file? In terms of living arrangements? Does he plan on ever leaving? Maybe even talking about that to him (if you haven't already) will let him know you intend to follow through with this.
Major hugs, lightyears. I am so so so thankful that H and I both have parents who are local, so once we made the decision, we didn't have to spend another night under the same roof. Is there no one you can stay with temporarily?