Horseplay Stables moved out of its longtime Milton location late last month and has reopened on Cherry Street in Middleborough. “We have an indoor arena for all-year riding and classes, as well as 15 acres for our horses to live like horses, grazing in open pastures,” said stable owner Terri Hoy in an e-mail. Hoy also reported that many of patrons of the Milton operation, who had been upset by news of the stable’s forced relocation, have made the move with her. Hoy had run her stable on land she had leased on Randolph Avenue in Milton since 2004. Her former landlord has development plans for the property.