It is a little hard to judge from the relatively small image posted here, but it appears to me that both fawns and the plants slightly beyond the fawns are within the DOF. Since I would judge the farthest fawn and the plants to be more than 5.3 feet behind the buck, I would guess that your lens actually focused on a distance somewhat farther away than his shoulder. If I'm correct, it would explain why his nose is more out of focus than would be expected. Check your original file and try to determine how far back the DOF extends; you can also attempt to judge the near limit of the DOF from the grasses in the foreground. Once you think you have determined the front and back limit of the DOF range, you should (hopefully) be able to estimate where in the frame the lens actually focused.