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“Hanging on the rail—that’s where it all counts. 1 don’t care if you’re a feeder pig producer or not,” Cooper concluded.
Barney Allen, another Extension Specialist in animal science, noted the changes in conformation standards for hogs since the 1950’s when animals were first put into confinement on concrete floors. “Since then, we've had to pay more attention to legs and feet in breeding programs," said Allen.
Prior to the 1950’s, breeders aimed at producing swine with curved spines and straight legs that set the animals up on their toes. Straight legged hogs had problems on concrete since this type of conformation gave no cushion for feet. Curved spines caused difficulties in rear leg movement on hard surfaces. Currently, swine producers strive to breed animals with straighter spines and front legs that have sloped pasterns and shoulders to act as shock absorbers, Allen continued. “These old boars, if their feet and legs are hurting, are not going to want to move around and do the job," he
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