My last hunting dog a English pointer black lab cross was a full on stealth mode dog when he wanted to be !
He once snagged a 1 lb block of butter off of the counter top and ate the whole thing and didn't tear the waxed paper wrapped around the butter !
Another time he ate 4 fresh out of the oven chocolate chip cookies by stretching out just enough to lean over and grab a cookie off of the cooling rack !
He also could clear a 4' chain link fence without touching the top wires ! And I watched him climb a 6' kennel fence corner and escape in less than 30 seconds after you were in the house , because he would watch and listen for the back door !