I found these in my silkies' water bowl today. I've kept chickens some 12 years now and have never seen anything like this. It has been consistently cold here, except today was mild in the 50s, so I'm assuming one of my birds must have spit these up into their water. I change their water every 1-2 days in the winter at least, so they couldn't have been there long. I have Googled crop worms and other chicken worms and I can't figure out an ID on these. Wondering if I should deworm the whole flock? I have Ivermec Pour On on hand. I run my birds in a portable coop with electric netting fence. It's definitely past time to rotate them, but the weather has been so muddy I had held off.