Yes, I hay and I give hay cubes, but nowhere near as much as what you guys do. Haying 6 chins and haying over 250 chins is quite a bit different.
I've had two cases of malo here. One in a girl who was 8-years-old that I bought. She was put down about 3 months after I got her. The other was a girl who, when I bought her, the hair around her eyes was a little matted, but I saw her eat and chew and she was a good weight. She also wasn't even a year old. Many of the other chins at his house also had the same thing, and since they were in a basement with no windows that could open, when he told me it was a ventilation issue (which I had seen before) I believed him. She was gone within 8 months.
Other than that, nope, no teeth problems. Do I recommend giving hay? Yup, I do. I don't know how much I believe that this one makes these teeth work and that one makes those teeth work though. Other than one person who went on and on about it (and then people picked up on it), I don't know of anybody else who has really said that. It just kind of snowballed I think. While I do think it helps wear their teeth down and keep them at a healthier length - I think hay is hay. I don't know if I believe one wears the teeth down more than others. I do believe they enjoy it and that it is a supplement to their dietary needs. Do I believe that every chin everywhere will die without it? Nope, as clearly evidenced by the many ranchers who don't feed it.
I wish I could feed it more often than I do. But it costs me over $60.00 for 50 pounds of hay, and I'm sorry, but that is nothing more than robbery. If I fed it every day, it wouldn't last me a week. I can buy a 1500 pound round bale of hay for $35.00, but for a little tiny box that I can feel safe feeding my chins, it's $60.00? My chins are not all that thrilled with those great big hay cubes either. They mostly just leave them sit. The only ones they will eat are the small ones from Oxbow, because they can hold onto them easier (yes, I've tried breaking the big ones, they are still huge). That's another $60.00 for a box of hay cubes. A bag is what? $6.00?? And now Oxbow is going to stop selling them directly and it's gone even higher through their distributors. For half the hay it's the same price as what I used to pay for 50 pounds. Mine hate Kleenmama's, they won't even touch it. So what's left?