They may be man's best friend, but it seems they don't do much to help our other close relationships.
A dog will cause almost 2000 family arguments in its lifetime, according to a new British study. That's 156 rows year - or three a week - over an average lifespan of 12.8 years.
The most common cause of canine-related conflict is what to do with the dog during holidays, closely followed by whose turn it is to brave the elements for walkies.
A quarter of owners also regularly row about where the dog should be allowed in the house, with the most frequent battlefields being the bed, the sofa and upstairs.
And discipline is common source of discontent, with 18 per cent of couples falling out because one thinks the other is too harsh on the dog and 15 per cent fighting over who should be training their pet.