We are new horse owners who know very little about horses. We’ve had our horse "Trouble" (a 2-year-old Standardbred-Arabian cross) for almost a week now. A local horseman said it would be fine to dump our two bags of buckwheat, red clover, and twitch grass seed in the exercise area. The problem is that in the last few days, she has completely abandoned her hay bale (it might not be very good hay) and is eating just this stuff. Are these seeds dangerous, and should we should get them out of there?