Yes you could pitch some more yeast, but it's unlikely it will be of too much benefit, IMHO. Stir it up a bit if you like (gently) and wait a couple more days to see if the SG is still dropping. If not keg it.
[/I] Up Next - Hobgoblin
After That - Czech Pilsner
Primary - Humboldt Hop Rod (4/24)
Primary - NOT Wheat AG SNCA (5/5)
Conditioning - SNCA Clone (3/3),