I know what may have happened because I've seen my buddy do it. First you pick a dog from the dog race and as soon as you do jump over to play a scratchy ticket, rub off the squares but do not hit the collect button. When the race is over it resets the scratchy ticket again. Scratch the ticket again and then hit collect. When back to the normal screen you will have -3 donuts. Now bring up the golden homer Buddha, click on it and it will give a premium item. You will then have -18 donuts. One time he was able to go negative for hundreds of donuts before it stopped. He logged off and then back in and the donut counter was reset to zero again. Note this only works when you have 1 or zero donuts.