Okay I feel like the worst chicken keeper ever but I'm not sure how she died. So yesterday my chickens were free ranging and a couple got into my neighbors field behind our place, no biggie I just went an chased them back. When i got them back I noticed a few drops of blood outside my coop and then one of my EE's was up roosting on the window sill and there were a few drops of blood beside her on the sill. I thought maybe a neighbors dog or cat got her so I checked her over and she seemed fine. I did not do the best job though and this is why I feel so bad. today when I got home from work I went out to my coop/run to check on them and let them out to free range for a bit. When I walked in to the coop I saw one of my EE's lying dead on the floor. I took her outside and began to check her over I found that an area in her abdomen the skin was quite purple and then as I kept looking I found a bunch of lice and their eggs. The area that all of the eggs were at also had some bloody areas I'm not sure if this was caused by the lice eating at her or an animal that might have got a swipe at her or something. Here are a some pictures Now I need to deal with this lice problem asap but could they have killed my chicken or was it something else?