I'm not so sure the kudu isn't yours. This could easily be the area where the ear tag hole (yeah I'm 99% it's an ear tag hole) was repaired . See the depression ?
I've been looking closely at this and I am sure the kudu cape is yours by matching details on the white facial markings.
Yes the ear skin could be retracting slightly in different humidity levels or the jostling could have caused some of the "putty" to flake off etc, OR it might have been there you just didn't notice as much from 10 ft away as the hole wasn't obviously visible- different angle of light hitting it.