I was gifted at Christmas with a Dogs Playing Poker calender. 19th century artist Cassius Marcellus Coolidge did more of these than I realized. We had this subject come up before and there is quite a lot available from an internet search or I recall there was also info availble from UNLV Gaming Studies Program. Don't worry, these doggies only use chips so this is indeed, chip related. This one is titled His Station and Four Aces. You will see as I post more of these, that dogs quite often get four aces, hence the term, "lucky dog".