When I wanted Bentley to lose weight the only time I saw results was by drastically cutting his food (as Barb suggested) and supplementing with green beans. When he was on his diet, he was eating 1/4 C twice a day supplemented each time with 1/4 C of green beans.
He lost 5 pounds easily that way.
I agree! If you feed a quality dog food that has at least 26% protein cutting their food in half and adding green beans (no salt or fresh frozen please) is the best way to go.
I have reduced so many dogs that come into rescue fat in the last year I know from personal experience that this will works.
Right now I have one named Jade that weighs 39 lbs. She shouldn't be more than 25 lbs so we have a long way to go, but 1/4c of kibble and 1/4 c green beans satisfies her and she is losing about 1/2 pound a week.
Best of all, we're all getting out of the snacking habit -- and the humans have stopped sneaking the Shelties people food.