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  My dogs get a new nickname about once a month, haha.  They seem to adjust just fine to their "new name".  But a lot of times these nicknames sound a little bit close to their real name... but not always.  "Little Imp" sounds nothing like "Epsilon", lol.  (My husband calls him that sometimes).  I think it's all in the way you say the name.  I know I have a special voice when I talk to my babies.
 I think you could probably train her pretty quick what her new name is too.  If she looks at you when you say her name, give her a treat.
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