5 LOHMANN TIERZUCHT › MANAGEMENT GUIDE 5 › Collection of blood samples › Extraction of DNA from blood Moreover, nationally and internationally, LOHMANN TIERZUCHT is ranked as first class for questions on poultry health, which is one of the decisive factors for performance and profitability. Intensive research in our own  Veterinary Laboratory, besides increasing resistance to diseases by genetic means and ensuring the strictest conditions of hygiene, is fundamen- tal to the quality of LOHMANN TIERZUCHT products. In addition, LOHMANN TIERZUCHT also pro- vides expert advice on all questions of feed, nutrition and  technical service. Practice profits from this extensive expertise in all aspects of poultry management. With LOHMANN TIERZUCHT products, eggs are produced in top quality and at competitive costs. Results of performance comparisons in the field and in independent institutes are proof of this success. LOHMANN TIERZUCHT products are often the winners and are always among the few at the top, worldwide. LOHMANN TIERZUCHT – the right partner for progressive, successful poultry management.