I went out to check on my flock and give them more water when I found one of my hens dead, she was a brown leghorn and was very small compared to the rest of the flock even though they are the same age, she has been getting up in the nesting boxes making funny noises and stuff at random times. I know she couldn't have been trying to lay an egg because she was merely 4 months, anybody have any clue to what might have happened?