The seeds are likely the heads of the wheat that didn’t thrash completely.Thank you. Funny that it has seeds and is also certified weed free!
This is why my stalls are always a mess at days end - they chooks dig, scratch and excavate away at the bedding, te hey fimd the heads of the straw, and beat the crap out of it to release the seeds and eat.
I’ll try to get a picture of one of the seed heads - it’s hilarious when someone finds a full seed head - the chase is on! Gosh I love straw. I even throw scratch grain in the straw for Georgie and her dumplings. Keeps them busy.