Hopefully all your doing will make a difference, and could very well have been seeing those cats was causing distress and hopefully you have fixed that now.
Hoping the new year bring lost of enjoyment and less worry with your little Calls they are so precious
I don't have calls or ducks that quack[Muscovy but there are a few call duck owners on here @Lacrystol being one
@Amykins being another maybe they will have some tips on what to do.
Just thought of another call owner @RavynFallen