Actually, the current theory is that allergies play more of a role in ear infections than do the position of the ear. True, there are a few breeds of dogs with excessively floppy ears (Bassett Hounds, Cocker Spainels, etc.) that do tend to have more ear infections than perky ear breeds, but I've seen scores of cropped Boxers, German Shepherds, etc. with chronic ear infections. Most often cropped breeds (like those with natural standing ears) have short ear canals and a wide, high set base and don't fall into the excessively long canal category. So, in these breeds, ear infections are not a good enough excuse (imo) to justify cropping. Most of the chronic ear infection dogs I see also have seasonal allergies which is a bigger risk factor than the hang of the ear. My first Golden Retriever never had ear infections, but she also had no other allergies. All I did was use ear wash after she was bathed and it kept her ears healthy.