How often do black rat snakes eat and drink?
In the wild, they eat as often as it is available, the wild isn’t like captivity where we feed them on average once a week, no more than that, because more than that is power feeding and that is dangerous. Water, they drink when available, but You should always keep an appropriate size water bowl in the tank for the snake, one that they can “soak” in that not only helps to hydrate them, but to help them moisten their old skin so they can shed better.