Without seeing the specific situation, it is difficult to assess. Keep in mind, however, that a number of reasons might exist to have the horses confined to this area. An area 25 by 25 feet with a run-in shelter is definitely providing them with adequate shelter from the elements, especially if the horses are well fed and in good body condition. Since this question is from Colorado, it may be that they are keeping the horses in due to the icy conditions in the pasture. Although it is more natural for horses to be kept outside in the pasture, many horses are housed in stalls for most of the day with only controlled exercise in a paddock or by ponying, lounging, or riding. This is quite common with show horses or race horses because of fear that they might sustain an injury. Although it is best for horses to have adequate pasture time to promote grazing and exercise and to thwart boredom, it is possible for horses to sustain injuries while simply running around in the pasture. This arrangement does not sound inappropriate, so long as the horses are in good condition and well cared for otherwise.
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