8 Inspiring And Unbelievable Pets That Would Win Any Biggest Loser Competition

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Dennis the Dachshund: Dennis once weighed 56 pounds - about four times his healthy weight! Fortunately, with a healthier diet and more active lifestyle, he lost over 75% of that weight.

2/9 Dennis the Dachshund: Dennis once weighed 56 pounds - about four times his healthy weight! Fortunately, with a healthier diet and more active lifestyle, he lost over 75% of that weight.

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Keano the Labrador: This sweet black lab lost 22 pounds and an impressive nine inches from his waist. Despite losing all this weight when he was five years old, his newfound energy and playfulness were back to puppy levels.

3/9 Keano the Labrador: This sweet black lab lost 22 pounds and an impressive nine inches from his waist. Despite losing all this weight when he was five years old, his newfound energy and playfulness were back to puppy levels.

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Merlin the Border Collie: This handsome dog once weighed a whopping 93 pounds - so heavy he was developing arthritis. Fortunately, with a healthy regiment of diet and exercise, he lost over a quarter of his body weight.

4/9 Merlin the Border Collie: This handsome dog once weighed a whopping 93 pounds - so heavy he was developing arthritis. Fortunately, with a healthy regiment of diet and exercise, he lost over a quarter of his body weight.

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Fifi the Cat: It's hard to believe that Fifi was once a skinny stray, because after being taken in, she ballooned up quickly. Fortunately for her, she's lost almost a quarter of her body weight and is now more active and playful.

5/9 Fifi the Cat: It's hard to believe that Fifi was once a skinny stray, because after being taken in, she ballooned up quickly. Fortunately for her, she's lost almost a quarter of her body weight and is now more active and playful.

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Kale Chips the Beagle: A rescued beagle, Kale Chips once weighed 85 pounds and was so obese that he had to be carried or wheeled around in a wagon. Look at him now: 22 pounds lighter and still losing weight!

6/9 Kale Chips the Beagle: A rescued beagle, Kale Chips once weighed 85 pounds and was so obese that he had to be carried or wheeled around in a wagon. Look at him now: 22 pounds lighter and still losing weight!

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Daisy the Bulldog: Daisy, a bulldog from Middlesborough, England, once weighed over 62 pounds. But with months of hard work, she lost over 17 pounds, an unbelievable 27% of her body weight.

7/9 Daisy the Bulldog: Daisy, a bulldog from Middlesborough, England, once weighed over 62 pounds. But with months of hard work, she lost over 17 pounds, an unbelievable 27% of her body weight.

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Ruby the Jack Russell Terrier: Once so heavy that she couldn't even jump from the floor to the sofa, Ruby turned it around through diet and exercise, shedding an unbelievable one-third of her body weight.

8/9 Ruby the Jack Russell Terrier: Once so heavy that she couldn't even jump from the floor to the sofa, Ruby turned it around through diet and exercise, shedding an unbelievable one-third of her body weight.

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Lucky the Labrador: Like many overweight dogs, Lucky the Lab used to suffer from extreme joint pain, to the point where he could barely exercise. After slimming down from 113 to 85 pounds, his whole life has been turned around.

9/9 Lucky the Labrador: Like many overweight dogs, Lucky the Lab used to suffer from extreme joint pain, to the point where he could barely exercise. After slimming down from 113 to 85 pounds, his whole life has been turned around.

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