I'm not sure what could have gotten to the chick in the brooder, here's the setup in case it helps figure out what killed it. I'm just stumped beyond thinking that the other chicks must have pecked and made it bleed, then reacted to the redness. I didn't find a spot of blood on any of the other chicks, and to be honest really don't want to believe they murdered their own little brother/sister. Plus if it's something else I'd like to stop it before it can strike again. So hence the trying to figure out if there's an other potential predator I need to consider.
The chick that was killed was part of a group of 10 2-3 day old chicks I had hatched. Since their partitioned off section of the big 4'x8' brooder box in the garage isn't ready yet, they live together in a large plastic tote for the past day as an intermediate brooder. (The rest of the big brooder box is holding older chicks right now, hence dividing it.) This brooder tote did not have a lid since it was in the garage that was locked down as a chicken brooder room.
At 4-4:30am I went down and put the last 3 of the 10 into the box since they were dried off and stable on their feet. I then checked on them two hours late to find the dead chick. It was on it's back with it's throat torn open and appeared, from the blood stains on the paper towels over the bedding, to have moved around quite a bit before finally falling to it's injuries.
Other than one large blood stain over by one wall, there wasn't any indication of what happened. The large stain appears to be where most of the bleed-out happened. The chicks have more room than when they were in the dry-off incubator together and had been raised with each other to date. The best I can come up with is that the chick may have fallen over and been unable to get up and then been pecked on the neck hard enough to draw blood. But I find it hard to believe that 2-3 day old chicks could peck each other hard enough to do that. I just don't know.
Thoughts/ideas on the culprit?
The chick that was killed was part of a group of 10 2-3 day old chicks I had hatched. Since their partitioned off section of the big 4'x8' brooder box in the garage isn't ready yet, they live together in a large plastic tote for the past day as an intermediate brooder. (The rest of the big brooder box is holding older chicks right now, hence dividing it.) This brooder tote did not have a lid since it was in the garage that was locked down as a chicken brooder room.
At 4-4:30am I went down and put the last 3 of the 10 into the box since they were dried off and stable on their feet. I then checked on them two hours late to find the dead chick. It was on it's back with it's throat torn open and appeared, from the blood stains on the paper towels over the bedding, to have moved around quite a bit before finally falling to it's injuries.

Other than one large blood stain over by one wall, there wasn't any indication of what happened. The large stain appears to be where most of the bleed-out happened. The chicks have more room than when they were in the dry-off incubator together and had been raised with each other to date. The best I can come up with is that the chick may have fallen over and been unable to get up and then been pecked on the neck hard enough to draw blood. But I find it hard to believe that 2-3 day old chicks could peck each other hard enough to do that. I just don't know.
Thoughts/ideas on the culprit?
