Chicken deaths

[tewks1]

Hello, I purchased 6 Melee's that were 3-4 months old. They have been doing great but the last two days found the cock dead in the coop, then today found one hen dead in the coop. Both untouched, no marks or pecks. Anyone have any ideas or suggestions. Coop is good sized 5 x 12 just spread lime on the floor for disinfectant, some fines gravel and then a layer of new hay.

Please help/
Thanks ,Michael

 

[chickenmum]

Aaw.