Did the vet mention maybe trying a drop with steroids? Like maybe this one?
http://www.firststatevetsupply.com/store2/antibiotics/opthalmics/neomycin-polymyxin-dexamethasone-suspension.html
-Kathy
I've only seen gapes once, but did just read somewhere that they can cause bubbles in the eyes, but don't remember where I read that. Like I said in my earlier post, I wouldn't treat for just bubbles, I would have to see more symptoms, like depression, weight loss or lack of gain.
Fecals are...
I think I read somewhere that gapeworms could cause foamy eyes, but don't quote me on that. FWIW, the amount of Baytril I use is 0.09ml per pound, but I would not use it if the only symptom was foamy eyes. One could also try Cipro eye drops, which you can buy from Twin City Poultry for about...