Holte-Stukenbrock Castle. Pets are trendy. According to the industry association for pet supplies, 34 million dogs, cats, small mammals and pet birds live in households in Germany. The industry records an increase in turnover from year to year. That’s why Ralf Venjakob believes that Schloß Holte-Stukenbrock can handle another supplier of pet food and supplies. On Thursday he opens a Fressnapf branch on Industriestrasse.