Have seen these and they work great for a few birds. I have 24 so I use a length of pvc guttering with two end caps to make a trough. I also did a flap over the top made of vinyl siding with a 2x2 at the bottom to make it flare out so that only 2" of the 4" depth was available and to discourage/prevent chooks from perching on it and prevent pooping in it too. I did two, one for water, one for food. They belly up to it 8 at a time to feed sometimes. Remember to make the feed trough bigger than the watering trough. Mine are removable and spill proof and can be removed by my lifting them a half-inch and sliding towards me. No spillage and no waste, ever. I do have to go inside to refill tho. I also have to clean the watering trough at least weekly of feathers and straw, etc..