Owners may think their pudgy dog or cat is cute, but all that extra weight spells trouble the some 85 million U.S. pets who are considered overweight, according to the Association for Pet Obesity Prevention. Overweight pets have secondary health problems and often decreased mobility. In 2011, pet insurance claims for pets with diabetes increased by 253%, cardiac disease claims went up 32%, and filings for arthritis-related issues were up by 348%, according to one insurer.

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