Hi all, I just got 2 light sussex pullets and 1 red sex-link hen (6 mos. old) 3 weeks ago. First chickens and brand new coop! "Ginger" the sex link has started to make a strange cough/choke sound intermittently the past few days. At first I didn't think much of it but now it seems to be getting more frequent. Today I saw her opening her mouth wide as if yawning. She is still laying normally and eating, drinking, and behaving normally and doesn't seem otherwise bothered. I do let them free range around the yard when I'm home and they did eat quite a few earthworms when I was gardening a while ago. The two pullets seem fine. Looking on these forums, looks like this could possibly be gapeworm? Anyone have any experience with this or advice? They get apple cider vinegar in their water already, but otherwise just grower crumble (for my other two 14 week old pullets), and free choice grit and oystershell. If I do need to worm them, what should I use? I'm in an urban area without a lot of feed/ag stores around - any idea where I can get wormer if necessary? I'm in Vancouver BC, Canada. Thanks all! I appreciate your advice.