An animal welfare charity in Warwickshire says the number of dog attacks on horses is rising.
The British Horse Society has dealt with more than 80 attacks on horses in the Midlands since 2010.
The figures comes as police investigate the deaths of three ponies who died in Dudley last week after a suspected dog attack.
The Royal Mail says it wants to take legal action against owners of dogs that attack its postal workers. 200 postmen and women were attacked in the West Midlands between April last year and this year.
The move follows a report by a former high court judge which recomends tougher legal sanctions against owners of dangerous dogs.