Modular box in reinforced fiberglass for 8 calves from 2 to 6 months of age, with two large side-sliding aeration windows in the back and a lifting bar . Upon request it can be supplied along with a metal fencing in deep hot galvanized steel and a removable front gate, 8 water-bucket holders and 8 nipple-bucket holders , a hay rack, fiberglass feeders and a rainproof protection over the buckets.