Pretty sure it isn't a rat.
Looks more like a meadow jumping mouse (Zapus hudsonius) or a deer mouse (Peromyscus maniculatus)

Ian

A baby rat will have a tail shorter than its body. An adult mouse will have a tail longer than its body. (house mouse anyway). Young rats old enough to be off their mother's milk are still larger than an adult mouse. Baby rats have large, rather stubby feet. And the rodent in your picture does not have the snout of a rat of any age. It's some sort of mouse.

I have various varieties of mice invade our old farmhouse, it's just part of living in an old farmhouse. The typical house mouse does look different and also has different colour than the field mice migrating from outside to the house in fall. But, they all look rather different than rats of any age.

Thank you all!!!!

Either way, I don't think it can breath in that bag.

Hilarious, gargwarb. Does that mean I have a warped sense of humor? It's bound to offend the heck out of somebody!!

It happens. I've made my peace with it. :)