I have frequently harvested dandelions as food for both people and pets for years. Some people really like it. Others find it terribly bitter. In my experience that's because it grows under different circumstances. Dandelions growing in moist ground tend to be sweeter than those surviving in parched ground. Those growing in shade tend to be tender and sweet compared to those growing in full sun. Dandelions growing in full sun can be quite palatable provided ground moisture is sufficient. As an example dandelions in local lawns become bitter rather early but tall plants growing in our shady local woods never become bitter. If dandelions do become bitter they can be boiled as greens with multiple changes of water or you can simply go pick some large sweet ones whose leaves are delicious plain on a sandwich.