CHELTENHAM, England, May 5 A British town hopes to shame dog owners into cleaning up after their animals by drawing circles around piles of poop.Cheltenham officials say that the tactic, combined with other measures, appears to be working. But some residents are not so sure, The Daily Mail reports.Under the new system, dog wardens who come across piles of dog poop spray paint red circles around it. If the mess is still there after a week, they add a yellow circle with a white circle going on after two weeks.Jamie Anning, a Cheltenham native, wishes the poop would just get cleaned up, although he said the circles make it easier to see so passers-by do not step in it."Have they not thought about the health risks of leaving this mess out in the open? Some of the pavements look like a weird dirty protest in the Tate gallery," he said. "And I dread to think what the smell will be like in the summer as it gets even hotter with all the poop lying around." Copyright 2007 by UPI