The worst thing I've read about in a long time is a new prescription drug for dogs, Slentrol. It is a weight loss drug. The side effects are vomiting, diarrhea, tiredness or they just stop eating. I can't even imagine how bad they feel. I took diet pills years ago and felt like I was going to die!
The problem is most commercial dog food is filled with grains and not protein. The grains turn to sugar in the body, the sugar turns to fat.
Please, if you have a pet that is overweight and even if it isn't, change your pets food to a high quality one with little or no grains and high amounts of protein. Your pet will love you for it!