The whole dandelion plant is eatable. Animals eat them often. The seeds have to go though cold cycle to germinate. They are not that easy to grow artificially or transplant, protecting them so they can let their seeds blow with the wind works best. They are part of the perfect lawn and field, dandelion and clover mix, both an excellent food source and low maintenance.
The U.S is one of the few places that promotes dandelion death by poison, part of the big pharmaceutical money before health agenda.