A Jack Russell terrier was found in Cumbernauld on August 27 with what appeared to be a botched tail docking attempt.
The Scottish SPCA was alerted after the dog was found straying with something clamped to his tail, causing an open wound.
Scottish SPCA inspector Jack Marshall said: “The dog was, no doubt, in a lot of pain and it’s unlikely he received any veterinary treatment.
“We’re hoping someone recognises this little guy as we’d like to find out what happened to him and how he ended up in this condition.
“Tail docking is associated with a number of negative health implications and the process itself can cause great distress to puppies that undergo the procedure. The healing process may take some time and could cause consequent health problems in later life.”
Anyone with information should call 03000 999 999.