The use of masking odors is not recommended. They may increase fighting. Pigs must be handled to inject the drug and they must be given the correct dose based on weight. Excessive dosages may cause drowsy pigs to pile up. Attempting to create uniform-weight pens .
Producers often attempt to sort pigs into pens with uniform weight penmates.
Fighting soon after weaning has no long-term effect. The larger pigs can be housed together, and the smaller pigs won t have to compete with them. Within a common age group, grouping older pigs into uniform weight pens is not recommended, although runts and poorly-doing pigs may be housed together. Hog Behavior during Handling Hogs have wide angle vision and are sensitive to sharp contrasts of light and dark. Lighting in weighing, breeding, and loading areas should be bright, but even.