context: -LRB- CNN -RRB- -- They 're big , strong , and fierce -- and they wear little blue booties . The police dogs in Duesseldorf , Germany are now patrolling the pavement in protective shoes that their police-officer handlers strap onto their paws . The reason ? Too many glass shards left by beer drinkers in the city center , said Andre Hartwich , a spokesman for police in Duesseldorf . `` We wondered how can we protect our dogs ' feet against glass , '' said Hartwich . `` We looked on the Internet and found these shoes . '' Beer drinkers along the Rhine River and in the city 's Altstadt , or Old Town , often discard beer bottles on pebbled walkways . Broken glass poses a problem for the police force 's 20 German Shepherds and Belgian Shepherds , Hartwich said . In addition , hooligans and vandals leave behind glass shards around New Year 's Eve and during the city 's famous Carnival celebrations . So what 's a dog to do ? Their handlers shelled out 60 euros -- $ 89 -- for shoes that are also worn by dogs who walk on ice in Alaska . Dogs need a month of training to get used to wearing the shoes , Hartwich said . `` We have to condition the dogs to the shoes , '' he said . E-mail to a friend
question: What was the reason that the dogs wear protective shoes ?
answers: Too many glass shards left by beer drinkers in the city center
content_span_normalized_text: too many glass shards left by beer drinkers in the city center , said andre hartwich , a spokesman for police in duesseldorf .
question_normalized_text: what was the reason that the dogs wear protective shoes ?
context_asr: THEYR BIG STRONG AND FAIRC AND THEY WERE LITTLE BLUE BODS THE POLICE DOGS IN DU DOR GERMANY ARE NOW PATROLLING THE PAVEMENT IN PROTECTIVE SHOES THAT THEIR POLICE OFFICER HANDLERS STRAP ON TO THEIR PAWS THE REASON TOO MANY GLASS JARS LEFT BY BEER DRINKERS IN THE CITY CENTER SAID ANDREY HARTWITCH A SPOKESMAN FOR POLICE AND DODOR WE WONDERED HOW CAN WE PROTECT OUR DOG'S FEET AGAINST GLASS SAID HARTWITCH WE LOOKED ON THE INNER NET AND FOUND THESE SHOES BEER DRINKERS ALONG THE RIN RIVER IN THE CITY'S ALTEDAT OR OLD TOWN OFTEN DISCARD BEER BOTTLES ON PEBLED WALK WAYS BROKEN GLASS POSES TE PROBLEM FOR THE POLICE FORCES TWENTY GERMAN SHEPHERDS AND BELGIAN SHEPHERDS HART WHICH SAID IN ADDITION OLIGANS AND VANDALS LEAVE BEHIND GLASS SHARDS AROUND NEW YEARS EVE AND DURING THE CITY'S FAMOUS CARNIVAL CELEBRATIONS SO WHAT'S THE DOG TO DO THEIR HANDLERS SHALL DOW SIXTY EROS ATY NINE DOLLARS FOR SHOWS THATARE ALSO WORN BY DOGS WHO WALK ON ICE IN ALASKA DOGS NEED A MONTH OF TRAINING TO GET USED TO WEARING THE SHOWS HARWAY SAID WE HAVE TO CONDITION THE DOGS TO THE SHOWS HE SAID 
question_asr: WHAT WAS THE REASON THAT THE DOGS WERE PROTECTIVE SHOES 