Pet shop operators in Mong Kok warned yesterday that it would be impossible for them to guard against well-organised professional pet thieves, a day after 'ram raids' on two stores. A stolen 24-seat school bus was driven into the Garven Kennel shop and New-Date Pet Trimming Salon in Victory Avenue on Thursday morning. There were a number of expensive animals inside, including a HK$160,000 prize-winning chihuahua, but none were taken and, miraculously, all escaped injury. The bus was later found abandoned in Sha Tin. No one has been arrested. Cat Koo, of nearby Harry Pet Shop, said she had not detected a rise in police presence in the area since the incidents and no officers had visited her to remind her to be more vigilant. She said show dogs were extremely valuable, with puppies going for HK$30,000 and champion breeds worth HK$300,000. She said it would be meaningless for pet shop operators to introduce extra security measures. 'There is nothing much we can do other than to make sure the locks we are using on our stores are secure enough and that we lock up properly when we leave for the night,' she said. 'But to be honest, those who carry out pet thieves are professional by nature since they know which breed of dogs they are going after. And you can do very little to stop them.' Ms Koo, who has been in the business for more than 15 years, was surprised by what happened on Thursday but said crime in the area had got worse recently with a series of muggings and burglaries. The owner of another store, Happy Pet House, said he had installed an alarm but had no plans to further upgrade. Last night the owner of the two damaged stores, surnamed Shum, watched helplessly as workmen continued clearing debris. 'I have no idea when the stores will reopen or how much business I will lose because of this,' he said. 'I have nothing much to add about the incident.'