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Let us introduce you to Bertie - he's a 6 month old goldendoodle in Hull. Now you'd be forgiven for thinking he's like any other puppy - chewing your slippers, barking at the postman and digging holes in the garden, but Bertie has a very special job to do. Our reporter Natalie Glanvill went to meet him and his owner Joanna Golding to find out more:
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