These dog images are stolen from a single artist named Michael Jones, who painstakingly carves sculptures using a chainsaw and documents the process. This has 1 million likes, 39k comments, being used to sell dog toys. Michael's original is second image here:
One FB group has been dedicated to identifying how these spread throughout the platform. One member there, Catherine Hill, has been systematically tracking these in Google Sheets spreadsheets.
One image, "Victoria's Art," has been copied at least 90 times