For giggles and grins, I am going to add another type of hog print to look for. After I shot this hog and it ran, all the landowner and I found initially were bizarre little horse-like hoof prints, tiny buggers at that. We found the hog about an hour later and something about it bothered me and then I realized the problem and it was quite obvious. It was a mule-footed hog! A guy on another forum had posted a picture of a hoof about a year prior, otherwise, I might not have noticed.
These aren't common. It is a condition that can be caused by natural variation/mutation (not sure of the specific biology, but it can sometimes just happen within a normal population) and at one time, mule-footed hogs were popular to breed, though that has long since passed. There were breeders here in Texas in the late 1800s and early 1900s back when this was popular. So this condition does occur, rarely, be it a breed leftover or natural random event in the population. The tracks they leave are sort of weird little mule/horse-like prints. The proper term for the condition is called "syndactyly" (roughly translated as 'together fingers').
The key trait is that the toes are fused together. The degree to which they are fused together can vary, however.
Pics 1 and 4 are the tops and bottoms of the hind feet and 2 and 3 are the tops and the bottoms of the front feet on this boar. You can see the differential fusion even within the fore and hind limbs of the same animal on the top side and tip. Sometimes it is just partial on some animals and the toes are partially bifurcated...whereas naturally, they are completely bifurcated.
This are pretty rare, but I would enjoy hearing if anyone else has shot one of these and in what county it was. Mine was in Montague County in 2011.