1. Institute of Animal Nutrition and Functional Plant Compounds, Department for Farm Animals and Veterinary Public Health; University of Veterinary Medicine Vienna; 1210 Vienna Austria
2. Department of Animal Hygiene, Behaviour and Management, Faculty of Veterinary Medicine; South Valley University; 83523 Qena Egypt
3. Clinic for Poultry and Fish Medicine, Department for Farm Animals and Veterinary Public Health; University of Veterinary Medicine Vienna; 1210 Vienna Austria