<p>MAYNARD, Mass. (AP) — It was a summer day at the dog park when Fred Levy, a professional pet photographer, overheard a conversation that he couldn't shake off.</p>
<p>A woman was talking about "Black Dog Syndrome" — a theory that black dogs are less likely to be adopted than those with lighter coats, perhaps because of superstition or a notion that black dogs are aggressive. Experts debate whether it's a myth or reality, but it struck Levy.</p>
