Reply to Rocke and Barker: The question is not whether birds are affected by thiamine deficiency or botulism, it is about the order of events

Contrary to the suggestion by Rocke and Barker (1), we do not want to exclude botulism as a part of the investigated wildlife disorder (2), because botulism may be secondary to the thiamine deficiency syndrome. This possibility and the investigations by Neimanis et al. (3) are discussed in Text S5 in our SI Appendix (2).