I'm having a problem with my month old ducklings. They now are getting their wing feathers and some have started nipping at the tip of just one duckling's wings. This paticular duckling has new feathers coming in that are lighter than the rest of it's body color, and I'm wondering if that is why the others are so drawn to bite at it's wing tips. This morning when I went to check on them I noticed a hole in their bedding that looked like one of them had been on it's side kicking it's legs. I checked all the ducklings and found them all to be ok. Upon closer inspection of the bedding I found blood in shavings where the hole was. I knew then that they had been lying down resting and the one duckling had been bitten on it's wing tip. I rechecked that duckling and sure enough it had a broken blood feather on it's wing tip. Luckily it had stopped bleeding, but the feather is still in place, what is left of it anyway. I know my ducks are just bored but how can I help prevent this when they are contained in their brooder pen? (Brooder pen is two large washing machine boxes stapled together & laying on it's side) I have some toys in their brooder box, but they pretty much ignore those. I give them kale leaves which they love and that seems to help occupy their time quite well. I also give them green beans and sometimes mixed vegetables. I know they want to be outside, but lately the weather here has been too cold. It snowed on Monday! It almost got warm enough yesterday for me to let them go out but the wind blew hard and that lowered the temps. Any advice?