I have shot deer and had them run 20 to 30 yards and stop. hit him again and he did the same thing both shots were right behind the shoulder. As for this deer I would guess miss and not a gut shot they will usually hunch up when gut shot. But again never say never we have recovered a number of deer we thought were misses. Always look again. If going back again look for some crows to be circling in the area that could mean a dead animal. Helped us find one once.