So I went to the feed store today and I got benzimidazole and VetRx. They didn't have the Tylan50 or the fenbendazole, but the lady told me that benzimidazole would kill gape. We treated her with both. We also fed her water with electrolytes, as we don't think she's been drinking by herself.
No real change in condition yet.
Another thing my mom noticed was that as she was feeling/massaging our hen's neck, she noticed sort of a nodule shape around the throat area. She said it was about peanut size when she started massaging, but that she thinks it got smaller after about 20 min. Is the nodule supposed to be there? Or is that a blockage of some sort?