Video shows them chasing each other and play fighting in family garden
Foxes and hounds are supposed to be sworn enemies, divided by years of hunting history.
But nobody told these two creatures, who have been getting on like a house on fire since they started living under the same roof.
Like a real-life version of the animals in Disney cartoon The Fox and the Hound, they became best of friends after both being adopted by a family in Cornwall.
Fox cub Forrest was taken under the wing of Gary Zammit, a wildlife ranger at Feadon Farm near Redruth, Cornwall, after he was found lost in a puddle earlier this year.
A touch of rivalry might have been expected between the young fox and the family's pet dog, Barney, but the pair have become the best of friends.
Mr Zammit said: 'It really was love at first sight with them both. Barney is so gentle with him and they play for hours and hours. They are exhausting to watch.'
Both the animals were adopted by the family after being found seemingly abandoned, and, amazingly, both are missing their tails.
Mr Zammit added: 'I think they might be kindred spirits - even without tails to wag you can tell they are happiest when they are together.
'It’s excellent news as Forrest will never be able to go into the wild now. We plan to give him a home here at the farm with our other foxes.