Don't know about distemper crossing over from dogs, but avian flu (also viral) is a serious problem among seals and other marine mammals -- it's possible for vi

Don't know about distemper crossing over from dogs, but avian flu (also viral) is a serious problem among seals and other marine mammals -- it's possible for viruses to have wide cross-species infectivity. https://e360.yale.edu/features/avian-flu-mammals-birds-seals https://e360.yale.edu/features/avian-flu-mammals-birds-seals