In theory I agree. Experimentally, trying to teach her that other toys are connected to different sounds, e.g. that the black-and-white cow is "moo", didn't produce any reaction so far. And I believe she doesn't understand the meaning of the word "not" yet, so I can't explain that some things are "not meow".
I guess this problem will fix itself later... that some day she will start also repeating the sounds for other animals. (But I am not sure what is the official sound for turtle.)
I am sure this isn't necessary, but, you do realize that she's going to learn language flawlessly without you actively doing anything?
Instead of saying "my " my daughter used to exclusively say "the that I use." My son used to append a "t" sound to the end of almost every word. These quirks sorted themselves out without us mentioning them. =)
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