The dog doesn't even have to be named. It could just be generically referred to e.g. "Hello Boy" or "Mutt".......though I can see the latter could cause identification confusion during the test drops
Seriously though......is the dog really important to the story? More of a worry is that the code word for breaching one of the dams was "Nigger". You can't escape the fact that that WAS an important part of the history