Dog training.

Player will can craft a retieve flag. You will can craft a retieve flag with 2 bones down and 4 wool up, something like a flag. Player can make different flags depending on the wool wheel. Now player can put the retieve flag on grass block ONLY in meadow biome (normal or sawanna). Next, the player must make a bone arrow from arrow and bone. After making a arrow , player must bring the dog around the flag, and shoot bone arrow. Player must shot far away, otherwise the arrow will burst. Dog will go follow the arrow, and will will disappear for 5 minutes. After that, dog will return to flag. On 50% chance he will trow the arrow from the mouth. Dog will get the strong effect to 10 minut and he will sit down next on the flag. Other 50% chance he will trow some trash item and he will sit down next to the flag.