It was probably Zimectrin Gold, which is ivermectin & praziquantel. It's a broad spectrum wormer that controls the widest range of parasites, including tapeworms. It is labeled for use on horses.1. for worms: give a little strip of horse medication. I chickened out and didn't buy it. It seemed too draconian to me to give a little chicken something that you would give a horse. In my consternation I didn't see what the product was. It said Gold on it.
I do not have experience with worming poultry, but I've seen cattle/sheep wormers being recommended for use on poultry. I would guess that using the horse wormer would be similar...maybe even a little easier- if you know the correct dose- because horse wormers are in paste form and don't drip/spill as easily as cattle wormer. This is just a thought, I'm not a vet.