I have my 2 ducks in a temporary pen till I get their other one built. It's a chicken wire pen attached to a dog house. (It's a pretty big house.) I lock the ducks in the dog house at night so no predators can get to them. No worries they have plenty of ventilation. My question is do I need to supply them with food & water over night? They've been making a disaster of the duck house bedding with water in there. They would only be without access to food & water from about 9pm till 6:30am. Is that too long? Thanks!