The Scottish SPCA were called by Mr McLachlan, who then alerted Moffat Mountain Rescue team.
SSPCA Inspector Janet Proudlocked watched as Sparky was brought to safety by the abseiling team.
When Sparky was found he had already lost a third of his body weight so he wouldn't have survived for much longer.
"His owners were very sensible to distribute posters in the area with their contact details as this is ultimately how they were able to find him.
"There is no doubt that he is an incredibly lucky dog and I was delighted to be present at the happy reunion between Sparky and his owner.
More top news
A group, made up of local businesses, had been given £30,000 to try and halt the decline of Hawick High Street.
Ticks can pass on Lyme disease. And as the temperature rises, so does their prevalence. Here's our guide to help you stay safe.
Peter MacMahon on the launch of the SNP manifesto.