Saw this on FB - hog with multiple feet on each leg. . Thoughts?
This is a condition called polydactyly, extra fingers/toes. It is not a deformation in the truest sense, but anomalous addition. It is not terribly common in hogs, but people find them occasionally. Most common are the inclusion of extra due claws/hooves. Extra main hooves are less common.
The hog doesn't actually have extra feet, only extra toes. A foot includes the carpals/tarsals, metacarpals/metatarsals, and the phalanges. The feet in the image only include extra phalanges and not the other parts that make up a foot. A hog does only walk on its 3rd or terminal phalanges that are often called the food, but are only part of the foot.