Yosef Karo

“ Paragraph 1 - One who needs to ride on an animal to travel for pleasure or for a holliday need and cannot walk is permitted to trim the horse's hoofs, to fix its horseshoes, saddle, and bridle, and to do any other activity necessary for riding. This assumes that one did not plan to do this work on the holiday. Rem"a: It is permitted to ride on hol hamoed even from city to city and even for no reason, and this is the practice. However, it is prohibited to do activities necessary for riding if one rides neither for a holiday need nor for travel for pleasure (Beit Yosef) . ”