Our loyal companions are packing on the pounds in step with us, a new study finds.

Surveying about 2.5 million dogs and 500,000 cats in the US during 2016, a group of researchers found that about one in three were overweight or obese. Looking over data from the last decade, the researchers say the new figures reveal a 169-percent increase in hefty felines and a 158-percent increase in chunky canines.

All the data is from researchers at Banfield, which runs a chain of veterinary hospitals across 42 states. The researchers surveyed animals that checked into one of Banfield’s 975 locations, putting them through a five-point physical and visual exam. Animals were considered overweight if their ribs were not clearly visible or easily felt and if their waists were also hard to see. Pets were dubbed obese if their ribs couldn’t be felt at all and they had no visible waist.

The inflating figures of our furry friends are in step with ours. The Centers for Disease Control and Prevention report that about 37 percent of US adults are obese . And a recent study found that 2.2 billion people worldwide— about 30 percent —are overweight, with 10 percent being obese.

As in humans, being overweight makes pets more prone to chronic health conditions. Also similar to humans, doctors blame pets’ weight problems on overfeeding and lack of exercise. Other contributing factors include genetics and health issues such as arthritis, which can make play painful. Last, some pet owners may not be able to spot weight issues in their pets—particularly because so many more dogs and cats are now overweight, making chubby pets the new norm.

Dog breeds with the highest prevalence of obesity are Labrador Retrievers, Cairn Terriers, and Cocker Spaniels, the researchers report. For cats, the fattest breeds are Manx and Maine Coons.

There was one striking difference between pet and human obesity data: geography. As the Washington Post points out, some of states with the highest rates of human obesity—such as Louisiana, Alabama, and Mississippi—had some of the lowest rates of pet obesity.

Instead, Banfield researchers noted that skinny pets in states with high human obesity rates also had some of the highest rates of parasites. This hints that pet weight issues may be more strongly linked to pet owner and veterinary care than the weight of pet owners per se. But there’s not enough data to make firm conclusions.

To beat the bulge in our fluffy BFFs, Banfield researchers recommend talking with your vet, cutting down on treats, and providing non-food rewards, plus boosting exercise time.

Correction (6/28): This story previously reported that states with the highest rate of pet obesity also had the highest rates of pet parasites. The researchers found that the states with the lowest rates of pet obesity had the highest rates of parasites.