Not sure. Used to be available during a tour shedule. Call for availability. According to tour site Clydesdale horses are available ever day during tour hours. Check site for availability. Google, Budweiser tours at Merrimack, NH.
You might want to call them and ask them
They do have horses there that you can visit anytime. But not all of the team
They have horses in the stables
I'm sure they are.
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