dead poults potential foul play

[SmokingPistol]

I found 3 dead poults today in my stock tank brooder. I have other poults in there so when I found these 3 they had been walked on quite a bit. I see npoolo obvious signs of death but I'm suspecting foul play. How can I tell if they have broken necks?
Thank you!

 

[binza1979]

How old? What breed? Were they too hot? Were they too cold?

 

[SmokingPistol]

2 week old bourbon reds and no they have all been happy and growing and they werent in corners or under the light.