a change of name works fine whatever the age of the dog. 
my first dog was 10 years old when i adopted her. she'd had a abusive past and i wanted to change her name incase she had been shouted using her old name. 
I changed it from Lady to Willow, and she accepted it really quickly. 
I changed Mollys name from Bubbles to Molly, and she was fine with it too. 
If you think of all the names you call your little one, and how quickly they get to know them all. 
I dont very often use Mollys proper name.. 
its usually Mollzy, munchkin, or scruffball, and she answers to them all...lol     |