Yea doves as in the eating kind. Doves (pidgeons) were once a big thing up here, witness all the doocots up this neck of the woods.
Q Fou's yer doos? = How's your doves (pidgeons)?
A Ay' peckin' or peckin' awa' = always eating (basically if your pidgeons are eating, everything is well)
Another well used greeting is 'fit like, loon? What like, man?
Nae bad or jus chavin awa' = not bad or just working away
It's quite a common form of greeting (my friends and other people I know tend to use these phrases) It wouldn't really be asked of outsider.