I planted wheat for the first time last year. But I planted winter wheat in July. It grew well, but it didn't grow seeds. At some point we moved the goat pasture to where the wheat was growing and they loved eating it. It was the only really green strong forage growing in the spot, so it was still a good thing for us. We don't get rain in the summer, so there isn't much green in early fall, tht is why is was nice for us to have for the goats.
Quinoa would probably not grow well in our climate, so I tried amaranth last year. We got a late start and an early wet season. It got moldy

This year I tried again. Our field got plowed earlier than ever

We got several volunteer amaranth sprouts and I planted some in two different places. They are at different stages and all doing well. The goats and chickens love the greens and they can get nice and big. I took pics, but my camera is not working right and the pics didn't come out.
I dried the amaranth last year and most of the greens were fed to the critters, before it got moldy. This yer I plan on drying itagain and hopefully I will get the grain as well. The grain/seed sprouted, even tough it was moldy. Actually the seed tha was more moldy produced more seedlings. go figure
I would advise anyone to just go and try planting whatever seed you are feeding your critters. You never know just what will grow in your micro climate! And even though the seed may not be exactly what you want, you can learn from it.
The millet we are growing originally came from sprigs of millet we bought at on of our farm stores. The broom corn we grow, I bought about 15 or so years ago. The amaranth I purchased at a farmstand that sells a lot of cool foodstuffs.
Just start somewhere, I did and I keep doing it. It is fun to experiment. Take a chance. Last year I planted 3 buckwheat seeds. I picked them up at the fair the year before. I got enough seeds out of that to plant a whole row this year, found out what they look like and found that it is a good feed for the chickens. I did read tha tit may be poisonous for goats, so I will have to do more research on that.