Does anyone have any idea what might have taken my 11 Dutch Hookbills from their tractor over night? They were about one month old and fat and healthy last night. This morning they are gone. I shut them in their chicken tractor as usual last night, this morning a board had been pulled off - the opening left is 2" by 3.5'. I'm sure the babies could have flattened themselves and gotten through the opening but it would have been a very tight fit. The rest of the tractor is intact and predator proof with hardware cloth and plywood covering the rest. The board that was removed was on hinges so I can move the tractor the let the board back down for a tight fit to the ground - I knew that board was loose but I never thought anything large enough to get the ducklings could get in. They have been in this setup for two weeks with no issues. There is no sign of a struggle or feathers or down or anything else out of place. The tractor is way too heavy for a raccoon to lift, I can barely lift a corner and I haul 50 lb bags a grain around all the time. The tractor was also surrounded by garden fence. This was just to keep the ducklings from wondering away during the day when we were around. It was not predator proof but the ducks never challenged it. The fence did not look disturbed. Our dogs did not bark. I've searched and searched but haven't found any of my babies and no sign of a struggle or "remains". I feel like such a bad duck raiser - I didn't keep them safe. I need to know what might have taken them so I can protect the chicks that are scheduled to go into the tractor next. I don't have the heart to try any more ducks. My only other try with ducks was an order of 20 crested Rouen's from Ideal. 6 died within an hour of arriving here, and one will never walk and is now a wonderful house pet. I was so thrilled when all the Dutch Hookbills survived their trip and thrived, and now this. I have had predators take chickens before - but one at a time and I could always figure out how it happened and correct the problem. For example we didn't know we had owls until we lost a chicken who was roosting in a tree surrounded by electric netting. Now everyone is fully enclosed at night. We didn't know Sharpshank hawks would fly in the open door (2' x 4') of the chicken tractor that sits 6' from the house until I saw it - now all birds small enough to be taken by that little hawk are fully enclosed day and night. Any help would be appreciated and thanks everybody on this forum for being so supportive and providing a safe place where people who love/care about their animals can share their high and low moments.