Chances are if your pet is overweight, you don’t even know it. At least that’s what a survey by the Association for Pet Obesity Prevention (APOP) says. Roughly 45 percent of pet owners with an overweight or obese pet thought their animal was at a healthy weight.

The majority of dogs and cats in U.S. households are now¬†overweight, with 52.5 percent of dogs and 58.3 percent of cats above their ideal weight. Dr. Brandy Vickers of Avenues Pet Hospital in San Francisco says it’s something she sees all too often.

“I would say two-thirds to four-fifths of the pets I see for regular check-ups are overweight to obese,” Dr. Vickers says.

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Sundown is at an ideal weight, according to the Nestle Purina weight chart. If you compare this picture to the chart below, you’ll see he matches up with the side view of the number 5 dog.

Overweight and obese animals are subject to the same diseases as humans and there has been a sharp increase in pet disease, including diabetes, hypertensions and cancer. But all these debilitating conditions are preventable by keeping your pet at a healthy weight.

You might be overwhelmed if you have an overweight pet, so we’re laying out the professional tips for getting your furry friend back in shape.