Changes

Conclusions: The study confirmed a high prevalence of ulcers in the gastric squamous mucosa of Standardbreds in race training. Of the studied parameters only status of training showed a significant association with gastric ulcers of the squamous mucosa.In a post mortem study, Hammond et al. (1986) showed a significantly higher prevalence (80%) of gastric ulcers among Thoroughbreds in race training compared with horses that had retired (52%), a finding supported by other authors (Murray et al. 1989, 1996; Vatistas et al. 1999b). (Jonssen 2006)

Conclusions: The study confirmed a high prevalence of ulcers in the gastric squamous mucosa of Standardbreds in race training. Of the studied parameters only status of training showed a significant association with gastric ulcers of the squamous mucosa.In a post mortem study, Hammond et al. (1986) showed a significantly higher prevalence (80%) of gastric ulcers among Thoroughbreds in race training compared with horses that had retired (52%), a finding supported by other authors (Murray et al. 1989, 1996; Vatistas et al. 1999b). (Jonssen 2006)

===Housing===

===Housing and Transport===

Housing in stables has been proposed as a risk factor for gastric ulcers, with more lesions being found in confined horses compared to those out at grass.(Murray and Eichorn1996).(Jonssen 2006).  However, when comparing solitary stable confinement with stabling next to a companion, and finally turn out in a paddock, Husted ''et al.'' found that the environmental circumstance had no effect on mucosal acid exposure in the equine stomach<ref>Husted, L, Sanchex, L.C, Olsen, S.N, Baptiste, K.E, Merritt, A.M (2008) Effect of paddock vs. stall housing on 24 hour gastric pH within the proximal and ventral equine stomach.  ''Equine Vet J'', 40(4):337-41.</ref>

Housing in stables has been proposed as a risk factor for gastric ulcers, with more lesions being found in confined horses compared to those out at grass.(Murray and Eichorn1996).(Jonssen 2006).  However, when comparing solitary stable confinement with stabling next to a companion, and finally turn out in a paddock, Husted ''et al.'' found that the environmental circumstance had no effect on mucosal acid exposure in the equine stomach<ref>Husted, L, Sanchex, L.C, Olsen, S.N, Baptiste, K.E, Merritt, A.M (2008) Effect of paddock vs. stall housing on 24 hour gastric pH within the proximal and ventral equine stomach.  ''Equine Vet J'', 40(4):337-41.</ref> Transport has also been shown to induce squamous mucosal ulceration(71 in Sanchez)

===Diet===

===Diet===