She looks about the same size as my girl and I feed her adult mice every 4 -5 days. I am going to do that until she grows into small rats, she is at an in-between size right now.

And I would recommend never getting the dog and snake used to each other. I have a no contact rule with my snake and cat, not even in the same room. Where I live, I really don't want my cat to learn than snakes are safe because we have tons of rattlesnakes, so I would rather my cat instinctually keep her distance from all slithery things as opposed to me having to pay a major vet bill. Your dog is probably afraid on instinct too. Lots of snakes are deadly, so lots of creatures, including many humans, will naturally avoid them.