http://www.bbc.com/news/uk-england-tees-37708831
A couple walking in Kirkleatham Woods, Redcar, heard whimpering and found the terrier-type animal in a mound of earth at about midday.
It was rushed to a vet but its injuries were so serious it had to be put down.
[....]
"It's likely more than one person was involved due to the force needed to inflict such an attack."
The dog was a white, scruffy-looking terrier type with a curly coat - possibly a Jack Russell or West Highland Terrier cross-breed - aged about seven years old.
Anyone with information is urged to come forward.