The input parameters were those agreed in the CVMP guideline (Environmental Impact Assessment for Veterinary Medicinal Products in support of the VICH guidelines GL6 and GL38 (EMEA/ CVMP/ ERA/ 418282/ 2005)) with the exception of bodyweight, which for broilers and turkeys was age specific, and nitrogen production per place per year, which for broilers (0.34 kg N/ place/ year) and turkeys (1.23 kg N/ place/ year) was higher than the value in the guideline as it was agreed that birds with coccidiosis would have a lower feed conversion efficiency and excrete more nitrogen than healthy birds.