Have you checked with feed mills and tack shops to see if you can get something similar?
When I had a whole barn full of horses I would get a bottle to worm the horses, and I know how expensive it is!
I almost bought a bottle last year to worm the chooks and would keep to treat my three...
Horse wormer etc can be bought at a feed store and is out in the open.
It’s hard to get some stuff but not impossible here in Canada. Also not sure were the OP is from but here in Ontario Vets can only see poultry if they have a large animal livestock licence to treat. Thankfully I have horses...
Hi fellow Canadian 😊
You can easily get Ivermectin here. Bought the liquid stuff for horses, you can get a ‘single dose’ syringe (single dose for a horse at 15ml).
This:
https://greenhawk.com/collections/dewormers/products/avl-ivermectin-liquid-dewormer-15-ml
I actually emptied the 15ml...