Husband wants to rehome dog...

My husband wants to rehome one of our dogs because she gets aggressive over toys but it’s something we’ve been working on with her and she’s getting better. This dog is the one who is always by my side, the one who comforts me when he’s on deployment and I can’t lose her. She’s been there with me through so much. I’ve told him all this before but nothing is sticking...any advice??