A dog and a suitcase of his belongings were found abandoned in a Scottish railway station last week.
Shar-pei crossbreed Kai was discovered tied to a railing outside Ayr station on Friday.
Alongside the pooch was a suitcase filled with a pillow, toy, food and bowl.
The Scottish SPCA used a microchip to uncover his name and contacted the registered owner, who said he had sold Kai on Gumtree in 2013.
Inspector Stewart Taylor, said: “Unfortunately they could not tell us the address of the person who bought him.
“This case highlights the potential consequences of selling an animal online as it often leads to the impulse buying of pets that people know very little about.
“Regardless of the fact Kai was left with his belongings, this was still a cruel incident and we are keen to identify the person responsible.”
Abandoning an animal is an offence under the Animal Health and Welfare (Scotland) Act 2006.
Pet dog and suitcase of his belongings abandoned at train station