Upon closer examination of his "bald ear", it looked like there is a scar, which could be a natural scar or even a suture scar.
Doesn't that look like a suture scar?
Now, here's what we hypothesise: Willy must have been injured and was caged for more than two weeks, which is the duration for the administration of antibiotics.
If that's true, that means there is someone else looking after him too!
Isn't that good?
Or, was it an injury sustained during active duty on his secret mission and he received treatment from the military base?
We'll never know, would we?