My last batch of Oxbow was very stalky. Lots of wastage. They would eat half of what I put in (if I'm lucky), but they tend to be rather picky. (It also had lots of seed heads which my pigs love but is apparently a bad thing?)
People seem to think Kleenmamma is much better than Oxbow. It's not available here, so I guess we won't get to see for ourselves anytime soon.
I tried Peter's hay again (oh, the shame) and it seems to have improved slightly, but whether it's seasonal variation or better processing there really isn't any way for me to tell. There aren't the stalks/long straws I saw in Oxbow though. The strands are much finer and softer but not as green compared to Oxbow.
I'll try Kaytee if I ever manage to spot a pack -- help for the locationally challenged please? I'm southside.