“…Animal advocacy informants in the same study additionally identified routine training and husbandry practices, human-horse interactions and the “everyday life of horses” as “where the real welfare issues are” in thoroughbred racing [ 3 ]. These are issues discussed in the general equine welfare literature and include topics such as housing [ 4 , 5 , 6 , 7 ], feeding [ 8 , 9 ], equine behaviour [ 10 ], equine emotions [ 11 ], equine welfare assessment [ 12 , 13 ], the application of equipment [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ], equine learning and training [ 22 , 23 ], the impact of equine activities on the horse [ 24 ], human handling during various forms of human-horse interactions [ 25 , 26 ], impacts of riding on behaviour and welfare [ 27 , 28 , 29 , 30 ], horse-human relationships [ 31 , 32 , 33 , 34 ] and people’s ability and inability to recognise behavioural signs of equine distress and pain [ 35 , 36 , 37 , 38 ]. A theme that unites these issues and that allows one to make assessments as to the welfare impact is naturalness, i.e., what is natural for the horse and what is in the horse’s nature in relation to their species-specific, as well as individual, physiological; emotional; cognitive; social and behavioural characteristics, abilities and boundaries.…”