My mum said "were not getting rid of the dog, the dog isnt the problem..We will get rid of your dad!" lol

Still makes me chuckle all this time after. Dont worry he can be treated, your doing the right thing getting your daughter to do the good things for him, but (im sure you are) please be present when she does it just incase Get her doing things simple like, "goood boy!!" and then you follow with "goood boy!" cause he trusts you more, so he will be thinking im responding well to the child, and now mummy is telling me im a good boy.
Its just sticking with it, were still cautious with mums dog, but were not ready to pounce on them anymore like we used to be.