Mrs Orchard who breeds dogs at Spilmah Home Boarding in Potton, near Biggleswade, Beds added:
“‘When he’s running around in the open it’s just as if he were the same as the rest of my dogs.
”When he first started going out there were no leaves on the trees but when the leaves grew there was the rustling and we noticed the change in his behaviour.
‘He would go out and to find his direction he would use his bark. It really does seem to be a form of echolocation.