Can you show a parakeet from a pet store like Petco and show it in a Parakeet Bird Show?

I'm sorry but no, birds from petco and other large chain pet stores are almost always inbred and are always American style budgies. If you buy from a breeder you may be able to find an English budgie. English budgies conform to the show standard below.

Unless your budgie looks like that your budgie cannot enter a competition. Hope this helps!

Cartier736 ; )

Excuse me? Um yes you can I have gone to and won first, second, and third place in over 30 contests with a parakeet I bought from pet world. He is a prize champion.

Think about that Cartier736