Pet Advice from Dr. Karen Becker

The 10.6 million tons of poop produced by US pet dogs each year adds a heavy burden to landfills and the environment. A greener solution, composting, is being used by forward-thinking dog parks, turning waste into a nutrient-rich soil amendment.

With so many genetic issues in today's breeds, such as hip dysplasia, hypothyroidism and eye problems, it may seem like an impossible task to find a breed that has relatively 'clean' genes. Yet it's a possibility with these 10 breeds.

Its cause is a mystery. Theories abound, but not a lot of definitive information. One thing's for sure - it comes on like gangbusters and can be fatal without equally swift and aggressive action. Find out the likely breeds, ages and fast-onset symptoms, so you'll be prepared.