Help, my mom is going to drive me nuts! Dog placement issues.?

I'm moving out of my house in a little under two weeks. Got a new place and the dog and cat are coming with me. My name is on both of their license papers and I pay for ALL of the cat/dog food and vet bills.

My mom is very attached to my dog, and I just recently told her that she would be coming with me when I moved out. She immediately became irate and said that the dog would "die under my care" or would "never go for a walk again" if I were to take her with me. Neither of these statements have a grain of truth to them, but she feels they are factual because she has no food or water in her bowl for maybe an hour tops. There has never been a day that she has gone without, but she claims my dog will have kidney failure from this. I am also the only person to walk her considering I haven't seen my mother get physical exercise in maybe 15 years.

Aaaaall day long she makes her little comments. Or when she's in one of her moods(which happen increasingly as my move-out date approaches), she'll go on and on about how she doesn't think its a good idea that I take the dog with me. I know its because she knows she'll be lonely when the house is empty, but its my dog and my cat and they are both coming with me. She can't even afford the dog food I have to get, let alone her own bills that she struggles to pay.

So I know I'm taking the dog with me, but what can I do to make her stop with her little comments and tirades whenever she's thrown into a mood? What do I say to her?