Auto Dog Food Feeder

My dog is overweight and so is my two cats can you help?
i’m 14 years old and my dog Princess is a 7 year old jack rat and the breeder I got her from said she would be 8-11 pounds she is 32 right now. My cats showed up outside and i took them in. Monkey which is 4 years old and is a persian and american short hair mix is 21 pounds and Buttons is 2 years old and a Siamese, american short hair, and Persian mix he is 16 pounds. Princess eats only human food not dog food and Monkey and Buttons eat 5 pounds of cat food a day out of a auto. feeder. Please help!!!! Can animals being over weight lead to a death at a young age?
Please take them out regularly for a walk and don’t over feed them.
Dog Food Auto Feeder