So I have a question. I am a huge dog person. Have grown up with dogs my whole life. I have a…

So I have a question. I am a huge dog person. Have grown up with dogs my whole life. I have a Pomeranian/border collie mix and a Pom/ German shepherd mix. The border collie was my fiancé dog before I met him and had never had any shots no matter how much I've begged him. Well lately his old age is making him really nasty in which he has attacked me multiple times. And I mean tearing into my arms and feet to the point of bleeding. Well last night I finally had it and told him that I don't trust the dog around a newborn and he needs to go. If he bites me now I would make him pay all of the hospital bills for tests since he's never been vaccinated and if he even looked at my child wrong I would put a bullet in his head myself. My dad seems to think I need to be more sensitive to the fact that it's his dog and believe me I've had to give up my dogs in the past and it killed me but I feel in this situation my fiancé needs to man up and worry about his baby that's coming.