Leo may be onto the answer--this hay doesn't have seed or heads. It's not as tough and flat as straw, it's softer for the dogs, that's how I got started using it.

Okay, I just called the feed store to ask about this. The hay I use is a coastal Bermuda, and it isn't grown from seed. To grow this hay they plant root sprigs, and when it is mowed there aren't seed heads in the picture. I don't know that it means this hay produces no seed, but the reproduction used commercially is by planting sprigs.

Of course, now that I've looked into it, I can see I'll probably make a switch for some of my use. Here is an Ag Extension PDF the describes how to start it. Lots of chemicals. I found that link from here.

Ironic that I battle the Bermuda in my turf all year (it gets into the gardens like nobody's business) and then I would use a close relative in the garden. :-/ It does work, though, to grind it back in and I don't get it growing in the garden, so it doesn't seem to bring along any seeding or sprig parts in the bale.

SRS