greybeard
Herd Master
I have tried 2 types of minerals. A couple of them will eat it, but most don't/won't. They do rather enjoy dumping over the bucket/bowl however so it's going into the soil every time it rains. So I guess the good is, eventually they'll get some benefit when they eat the grass in that area.
Maybe.. A large percentage of many mineral supplements is salt. Concentrated in one area, it usually kills grass.