I just lost another bird this morning - going into her 3rd winter and I'm pretty sure it was a build-up of internal parasites/worms. I just didn't catch it soon enough but she couldn't keep weight on and had just started to show signs of anemia. SOO - since we're headed into the dark and difficult time of our Colorado year, anyone have suggestions of what I should be doing to better control parasites? I check my birds externally at least once a month, have spread food-grade DE around their inside coop and have just added more apple cider vinegar to their water (while I can before it goes into the galvanized heated waterer soon). What am I missing? I'm pretty sure when I lost my first bird it was probably parasites too (looking back at weight loss and such) and I don't really want to haul up to CSU for a necropsy when my flock hasn't had contact with anyone else and all signs point to parasites. Any suggestions? Worming protocols you follow? Thanks for the help. Now down to 3 birds and feeling depressed since it seems as I've failed my flock when I probably could have done something sooner to save her.
I'm sorry for your loss

I'm not a chicken person, but maybe you could consider doing your own necropsy? Never done it myself, but I've read of others on the forum that do this when they lose a bird. If you suspect parasites, obviously you'll have to be very clean and sanitary... and do it at a great distance away from the other three. Maybe something worth looking into, it's just what came to mind. If you do find the culprit (worm or worm's egg), why not post a picture and someone might be able to tell you exactly what the parasite is.
Or if you are feeling really bad and depressed and opening her up doesn't sound like your thing, maybe it's worth it to take the carcass up to CSU for peace of mind? Or are there any vet schools in Denver?
Otherwise, you seem pretty sure that it is worms. It would be a good measure to deworm the remaining three. Some folks on the forum deworm their flocks preemptively on a regular basis (once or twice a year, something like that) so there is a good deal of information and specific instructions on how to do it. You can type in "deworming" or something like that into the search bar.
Could the chickens be eating metal (screws, nails, drinking from rusty pales)? I see you add ACV to their water; if the waterer is galvanized steel, the vinegar corrodes the zinc coating causing it to leach into the water. Weight loss is also associated with metal toxicity (I think it's called hardware disease)... along with other symptoms. You could look into that too. That would be the good thing about opening her up... they/you might be able to identify exactly what caused the death.
Sorry if I'm telling you things you already know, I just wanted to share my thoughts in case.
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