When I lived in the city,
For a while I would put them into flower beds and work the grain into the soil, then after the plants came up, I couldn't do that. Once I was redoing a flower bed and told my wife that I was going to put a bunch of mash into the bed and she told me not to do it because, it wouldn't help and would be harmful, I knew she was wrong, she was gone to the store, I dumped that mash in and mixed the soil real good. Several months later, the flower bed was doing great, she says, "wow the flower bed is doing great", and I told her what I had done, she never told me not to again.
Another time, I would dump them in a pile near the back of the yard, kinda a compost pile, and I found my little dog out the chowing down several times over the next week, I noticed it smelling bad and spread the stuff out into the flower bed. I was also concerned that the rats from the field were feeding there too.
For another period of time I had several different people that had chickens and they would come by and pick up the bags of mash and would always leave a dozen or two or three of eggs in return. One fellow had fancy chickens and the eggs would always be pastel colors and looked like Easter eggs.
Now I live in the country and dump them at the edge of the woods. There is a man that lives nearby that I haven't met that keeps chickens, but with COVID, I don't want to go knocking on his door and be asking if he wants it.
Also with my current job role, I don't get to brew anywhere near as often as I used to. Now it's at best four times a year, realistically one or two.