Yes understood that they stop or slow down laying during the winter. No signs of worms in the droppings. What do you think of the pumpkin seed/garlic and app,e cider vinegar as prevention/treatment for worms?
The ACV w/ mother, 1 Tbs/gallon, only every other day, is no miracle cure for anything, but has probiotics, kills bacteria, balances the PH in the bird, cleans the gut, etc.
A lot of things are prevention, but once our birds have something, such as worms, mites, etc., you then need the right product that can quickly do the job.
I'm not saying herbs don't help, it's just once your bird is sick, by the time they work, your bird has been suffering needlessly or could die. For instance, if you wanted to feed garlic and pumpkin seeds throughout their life, that's fine, and perhaps yours never would get worms, but once they get them, it's not going to help much.