The two Bielefeld pet product companies Hunter and Collar Care have concluded a cooperative agreement. Collar Care is a start-up established last year by four young, enthusiastic founders. Their app of the same name, which has been available for android and Apple devices since November, has already become a permanent feature of the daily life of many dog owners. Together the two companies aim to "do everything conceivable to make the everyday existence of dog owners and their four-legged companions more pleasant and comfortable," they say.