Pen riders move through the feedlot corrals on horseback, watching the cattle with a sharp eye. They are looking for illness, weaving through the herd day after day. They hear the animal with atypical interstitial pneumonia (AIP) before they see it. There’s a rattle in the heifer’s breathing and loud grunting. When they locate the […] Read more The post Serotonin may be key to solving pneumonia puzzle in cattle appeared first on Canadian Cattlemen.