I'm trying to decide on a heated bowl for my ducks during the winter. I only have four ducks, so they've been using a gallon ice cream bucket for a while - they go through about two of them a day. The only problem is that with the temps in the single digits (or below at night), the bucket's freezing over between changes. I'm going to get them a heated bowl or bucket, but I'm wondering whether they'll get stuck and drown in a bigger bucket. Have you ever had a duck have problems with a bucket this size? These are the two I'm looking at. Which one would you choose? I'd prefer to have the bigger bucket if it would be safe for them, but if it'd be an issue, I'll go for the shallower, smaller bowl. 9 quart bucket: http://www.tractorsupply.com/allied-precision-heated-bucket-2-25-gal-capacity-2170071 5 quart bowl: http://www.tractorsupply.com/api-all-45-seasons-electric-heated-pet-bowl-5-qt--2411794 Thanks so much!