It isn't just human portion sizes and waistlines that have increased and expanded over the past five years. Fido and Fluffy have gained weight, too.

According to a recent report from Banfield Pet Hospital, 37 percent more dogs and 90 percent more cats are overweight than they were five years ago.

Banfield, the world's largest veterinary practice, recently released its State of Pet Health report, detailing findings about pet obesity, as well as other common health problems in dogs and cats.

The report analyzed data from the 2 million dogs and nearly 430,000 cats cared for by Banfield vets, working in 800 hospitals across the country, according to a press release.

But, just like we don't always recognize obesity in ourselves, pet owners don't always think their furry friends are overweight. More than three-quarters of dog owners and nearly 70 percent of cat owners believe their pet is at just the right weight, according to the report.

"It's a sensitive subject," Brittany King, D.V.M., associate veterinarian at the Banfield Pet Hospital in Cypress, Texas, tells The Huffington Post. "You don't want to tell [someone] 'Your pet is fat.'"

While it's a necessary realization for many owners to face, she says, it's often a fix as easy as measuring the food you give your pet each day. Even shedding just a few pounds is good for your pet, she says. "We're not [always] looking for drastic changes."

Another easy way to help your pet eat healthy is to ease off the treats. "As we get busier, a lot of owners don't have a lot of time to spend with their pets," says King. "and think 'I'll show my pet love by giving her an extra treat.'" Also keep in mind that a treat can be a piece of her regular, healthy food, she adds, or make a walk or a new toy a reward rather than using food at all. King suggests making sure all familiar members are on the same page, too; you may be feeding Fido appropriately while a young child is sneaking him French fries under the table!

Like with humans, where pets live seems to have some influence over whether or not they will be overweight. However, the most and least obese states for humans aren't always the same states where pets have some extra pounds to lose.

Banfield's report found eight states where both dogs and cats are at high risk for being overweight or obese, and 10 where both are at low risk. Click through the slideshow below to see if your state made the list. Then tell us in the comments if you agree with the findings.

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  • Least Obese: 1. Louisiana

    Nine percent of dogs and cats are overweight or obese. <br><br> Nationwide, one in five dogs and cats is overweight or obese, according to the report. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/stuseeger/5416973669/" target="_hplink">StuSeeger</a></em>

  • Least Obese: 2. Arkansas (Tie)

    Thirteen percent of dogs and 11 percent of cats are overweight or obese. <br><br> If you think your pet might be overweight, keep in mind that there isn't one exact weight a certain breed should be, says King. When evaluating a dog or a cat, she takes into consideration many different measurements, including around the ribs and waist, and factors in genetics as well, she says. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/seandavis/5054884512/" target="_hplink">Sean Davis</a></em>

  • Least Obese: 2. New York (Tie)

    11 percent of dogs and 13 percent of cats are overweight or obese <br><br> Having problems with a family member who likes to sneak table scraps to pets? Ask them to at least stick to fruits and vegetables, says King. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/60278244@N00/2835964917/" target="_hplink">Joscarfas</a></em>

  • Least Obese: 2. Connecticut (Tie)

    11 percent of dogs and 13 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/zoe/4066049335/" target="_hplink">citizenswaine</a></em>

  • Least Obese: 5. Mississippi

    Eleven percent of dogs and 14 percent of cats are overweight or obese. <br><br> The rise of pet obesity mimics the rise of human obesity. The CDC reports that <a href="http://www.cdc.gov/obesity/data/adult.html" target="_hplink">more than a third of American adults are obese</a>. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/stuseeger/4253303916/" target="_hplink">StuSeeger</a></em>

  • Least Obese: 6. Montana

    12 percent of dogs and 14 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/csbarnhill/2633187564/" target="_hplink">csbarnhill</a></em>

  • Least Obese: 7. New Hampshire

    Fourteen percent of dogs and 13 percent of cats are overweight or obese. <br><br> Dog and cat waistlines are also expanding around the world. One British charity aims to combat pet obesity by holding a <a href="http://www.huffingtonpost.com/2012/04/10/obese-pets-biggest-loser_n_1415523.html" target="_hplink">"Biggest Loser" style competition</a> for some of the UK's heaviest furry friends, HuffPost Green reported. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/ianbruce/2819221651/" target="_hplink">Ian Bruce</a></em>

  • Least Obese: 8. Alabama (Tie)

    12 percent of dogs and 16 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/acnatta/264575595/" target="_hplink">acnatta</a></em>

  • Least Obese: 8. Georgia (Tie)

    12 percent of dogs and 16 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/minhocos/5742374911/" target="_hplink">Maulim</a></em>

  • Least Obese: 10. Wisconsin

    13 percent of dogs and 16 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/rahimageworks/5639895018/" target="_hplink">ra_hurd</a></em>

  • Most Obese: 8. Iowa

    Twenty-five percent of dogs and 22 percent of cats are overweight or obese. <br><br> The added weight is likely contributing to other chronic diseases in pets, according to the report. Forty percent of dogs and 37 percent of cats with arthritis are also overweight. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/steffens77/6671475405/" target="_hplink">steffens77</a></em>

  • Most Obese: 6. Nevada (Tie)

    25 percent of dogs and 24 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/http2007/4700328574/" target="_hplink">http2007</a></em>

  • Most Obese: 6. Massachusetts (Tie)

    24 percent of dogs and 25 percent of cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/rene-germany/1593942617/" target="_hplink">ReneS</a></em>

  • Most Obese: 5. Colorado

    Twenty-four percent of dogs and 26 percent of cats are overweight or obese. <br><br> While feeding habits play a big role in pet weight gain, King surmises weather may also be an important factor. Pets living in colder states may not be able to get outside as much as pets living in more temperate climates, she says. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/ctcaldwell/6415007785/" target="_hplink">Raw Processor</a></em>

  • Most Obese: 4. Washington

    Twenty-five percent of dogs and 27 percent of cats are overweight or obese. <br><br> Almost half of dogs (42 percent) and 40 percent of cats with diabetes are also overweight. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/dph1110/472778842/" target="_hplink">David Herrera</a></em>

  • Most Obese: 3. Utah

    27 percent of dogs and cats are overweight or obese <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/72213316@N00/5242337433/" target="_hplink">Alaskan Dude</a></em>

  • Most Obese: 2. South Dakota

    Twenty-nine percent of dogs and 32 percent of cats are overweight or obese. <br><br> Forty percent of dogs with high blood pressure are also overweight, according to the report. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/ladydragonflyherworld/4270013105/" target="_hplink">LadyDragonflyCC & GollyGforce hunting Morels!</a></em>

  • Most Obese: 1. Minnesota

    Thirty-eight percent of dogs and 41 percent of cats are overweight or obese. <br><br> Sixty percent of dogs with hypothyroidism are also overweight, according to the report. <br><br> <em>Flickr photo by <a href="http://www.flickr.com/photos/anthonyfarrigo/3275676318/" target="_hplink">anthony arrigo</a></em>

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