Thething is the childs bone structure and mental aptitude are not in alinement what you dont need at that age is something to stop natural developement of the skeleton with all the implications. You dont take a big dog under the age of 2 running unless you want a dog with bad hips later in life the same theory applies to kids under the age of 14. adog of 1Year is 7 to us as humans hope you understand its 5.30 cant sleep.