Sometimes owners and managers want to use two speed or variable speed fans in positive pressure tube systems so that they can adjust the airflow rate from the minimum rate to a higher rate as animal numbers increase, calves grow, or outside temperature increases. It is simple to install either a two speed fan or variable speed fan and the appropriate controller. However, fan performance changes as fan speed changes and this can impact tube system performance.
Here we are in the transition heifer housing. Heifers at this dairy move from hutches into small outdoor group pens (10 calves) where they continue their ration of free-choice pelleted grower concentrate (18% protein) and water.
New federal regulations have changed the requirements for the use of some on-farm antibiotics. Jim Salfer, Dairy Extension Educator at the University of Minnesota, discusses details of the updated Veterinary Feed Directive.
Researchers at the University of Alberta conducted a study that showed feeding heat-treated colostrum soon after birth promotes the colonization of beneficial bacteria in the gut, thereby increasing passive transfer of immunity and decreasing enteric infections in calves.
As the mercury drops, nutritional demands for young calves change. Tracey Erickson, Extension dairy field specialist at South Dakota State University, offers guidelines for boosting nutrients to help provide winter fuel for preweaned calves.
Rob Costello with Milk Specialties Global Animal Nutrition recently visited True Farms, Perry, N.Y., to inspect and videotape their new group-housing calf barn with autofeeders. Watch a 6-minute video of this innovative new facility at work.