Huge Ears that Stick Up - Supposed to be Purebred

by ddgirlhawaii@earthlink.net
(Hawaii)

I purchased my female jack russell in Oct. 2007 and as she got older her ears grew to almost the size of her body sticking straight up. I see that there is something called Prick ears, however, hers seem even larger like a cattle dogs ears on such a small body. I bought her as a purebred and the owners claim theirs are pure bred. Could there be a throw back gene of another type of terrier in the blood line? I wanted to use her to breed with my male, but now do not want to breed them if she is not pure.