I carry it around close to my body for about 1hr before trying to inject. I also inject nervous horses in the pectorals. (did one yesterday as owner couldnt) and it didnt seem to mind as much. Perhaps they are not expecting it there. good luck.
make sureyou enter the restricted section as this is for new /amatuer riders. once you have i believe 12 points at the next level you can no longer enter the lower one