Watch Julia Barthram's report on the age old problem of dogs and postmen. Everybody knows they don't always get on and now dog owners are being urged to take better control of their pets.
120 postmen were attacked by dogs in the North East last year.
The number of attacks goes up dramatically during the summer months and especially in the nice weather. That's when pet owners are most likely to leave doors open and let their animals out into the garden.
Since April 2011 there have been over 5500 attacks on Royal Mail staff across the UK as a whole, some leading to a life changing injury. The attacks also lead to more than 4000 days off work.
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