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Originally Posted by mommadog1  I have to disagree, there is no proof of that. If you have some I honestly would like to see it. |
I don't know what constitutes proof to you, but Ann Seranne, in her book The Joy of Breeding Your Own Show Dog, has a list of genetically dominant and recessive traits. As pertaining to ears...small ears, high set ears, narrow ear leather and dropped or tipped ears are all recessive traits. Large or long ears, wide ear leather, low set ears and erect ears are all dominant traits.
If you look at the old photos and drawings of the first Yorkies, some had prick and some had flop ears. A great many of them that showed prick ears were the result of ear cropping, though prick ears did also occur naturally.