dog or fox?

dog or fox?

Observation - dog or fox?. Description: Spotted this animal while walking my dog this morning at Maiden Erleigh nature reserve. As you can see it is just skin and bones so i thought it must have been dead awhile but it was only a few feet off a well trodden path and i wondered how it could have

Spotted this animal while walking my dog this morning at Maiden Erleigh nature reserve. As you can see it is just skin and bones so i thought it must have been dead awhile but it was only a few feet off a well trodden path and i wondered how it could have lain undisturbed long enough to be in the state it is. I cant tell if its a fox or a dog. Can anyone enlighten me please.