Soooooo we got our black lab Jackson back and he seems to get along just fine with Sailor. Not that the two play with each other though.
Jackson: 78lbs, Black Labrador. Overweight, loyal, highly unenthusiastic.
Sailor: 19lbs, Cockerspaniel Pomeranian Mix. Independent, excitable, opportunist, highly enthusiastic.
So what happened? We gave Jackson his oral treat. He took it and walked off like a loyal pet.... then Sailor jumps in and STEALS the treat out of Jackson's mouth. Ever since we took Jackson on a walk with Sailor, Sailor has constantly been trying to 'one up' Jackson in every respect. However we leashed them two together so Jackson's lack of care for anything but Dad restrained Sailor the entire time!
I'll upload a vid sometime.