Currently working on new pens for my pink footed geese and black-bellied whistling, They will be low maintence pens, Roof will be slanted collecting rain water from roof into the gutters which flows straight back into their ponds, when the ponds are full all the rain water then flows into water butts, all mess made by them is hosed down then brushed off floor into the drain system which is then mixed with 3/4 water 1/4 duck waste to produce lovely fertiliser to be drained into the vinevard, plants grass etc. Feeding and watering; both feeders and waters are attathed to the fence, so they will never be tipped, imagine a basketball net with a bowl where the hoop it, very good invention, get them off the internet, once feeders are empty, they will refill with turn of 2 handles which fills up from a compartment at the back which slide across to create a gap which the water and feed comes through and are cleaned every 2 days, The pond is a huge water trough 6ft by 3ft, which has a bung on the bottom and is drained once a week, and treated with duck friendly water cleaning solution (dfwcs) cleaning is quick and easy and refills are quick just use the water that filled up from the water butts. I have a small veggie patch just for the ducks which over grows so they can get to the odd bit or 2, I grow lots of water plants for the ducks too. working on an auto door without using anything electronic, I have a few ideas will post them soon, Ive been extremly busy with omelet and my other work with various wildlife trusts. I Have plenty more ideas to go into this pen, anyone else think of any ?