1. Clinic for Avian, Reptile and Fish Medicine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, A-1210 Vienna, Austria
2. Institute of Nutrition, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria
3. Department of animal Behaviour and Management, Faculty of Veterinary Medicine, South Valley University Qena, Egypt