IF you go very prepared for all of his questions, cost of all the care, and YOU can manage it maybe this will help.
The other question as a mother and grandmother I have to ask...do you pay them rent, electric etc.. and take care of yourself totally? I know, I do not mean but the other problem maybe he is worried that you can not take care of a dog (baby) if you can not take care of yourself. If you do take care of yourself then I am sorry I even brought it up