I got my chicks started on a 5 nipple 5 gal. bucket and they love it. I raise rabbits too and I was going to leave my "farm" for a week. I had a fattening pen of 5 bunnies that drank a lot of water. I didn't want to burden my neighbor with filling multiple water bottles so I tried a bucket with 2 nipples and they loved it. I am now incorporating the method with my older caged rabbits and they by-pass the ball-tube bottles and drain the nipple bottles first. I am 71 yrs. old and rigging the pvc pipe with nipple system and gravity bucket is a little much for me, but I can put together the gallon jug nipple system per cage easy and quickly. Thank you.