Hebei Dayang Animal Healthcare Co., Ltd. was founded in 1998 and the former of it is Changzhou Dayang Veterinary Drugs Co., Ltd. Now it has changed its name for Hebei Dayang Animal Healthcare Co., Ltd. It main produces 50% of animal feed grade choline chloride, feed grade choline chloride 60%, 70% feed grade choline chloride, feed grade choline chloride 75%. It is one of the largest manufacturers. The planned productive ability can be 30,000tons choline chloride. In June 2006, it passed the test of Hebei Feed Office and Agricultural Department and gained the production permit of feed additives