I had Amira shod, every eight weeks, even when she was in foal, for the first ten years of her life. Then, due to a number of other factors, she did not get shod for two years and I trimmed her and the Minis. She never was shod again, she had hooves of steel!!! In fact I never shod any of my horses after that, except one little pony that had foundered- she, of course, needed shoes as she was in work. As with everything, each horse has to be taken individually and assessed for it's needs, and then you need to look at your terrain,carefully. I can see no reason why not, so long as, for the first month or two, constant reassessment was done.