The 6 month carrot

Planted in July, early harvest today. Many are still left in the ground to mature fully. Does anyone know how safe 6-month old carrots are to eat? It's too late for me since I tried a couple already. Some taste sweet and light, others taste heavy and woody. I'm wondering what kind of nuclear waste in our heavily-amended clay soil caused the deformities. Maybe after another 6 months the rest of them will be full size. Mickey saw me and Daniel pull some out and when we turned our backs, he pulled one right out of the ground with his mouth.