I admire you, and mourn with you. The Universe and all the dogs in my life, (and there's been a LOT) have proven to me that the right dog comes into our lives just when we need them most. Such is the case with my Harley, who is allergic to damn near everything, cannot STAND his ears being touched (and cleaning them is a nightmare for him and us) and also eats homemade food. It's better for them anyway.
Give Fish a kiss between his bat-ears, and hang in there.