Cats are very barely domesticated. As someone who regularly deals with feral cats, I can vouch that 'domesticated' is not entirely accurate for them.
My corn snakes have been in captivity for many-many generations. I've had some be so lazy about their food that feeding live would be a terrible idea. I'm also breeding solely for temperament in one of my lines... effectively working to 'domesticate' them the way those foxes were. So... *shrugs*
On another point:
I have fed my corns nothing but f/t. I have not had a single issue with constipation, ever. As long as they have constant access to clean water, the amount of moisture lost to freezing is minimal and easily countered by a couple seconds of drinking.