critical thinking skills a must... If you tease Dallas up to +3 it is because a bettor belives Dallas cannot cover the -3 right, otherwise why tease it?
Now using the bettors original belief that Dallas cannot cover the -3 and he needs to tease it, the logical move would be to tease Greenbay to 9!
If you dont think Dallas can cover the -3 they for sure aint going to cover -9 based on the bettors original logic. Most bettors tease the wrong side.
Only reason bettors tease a favorite down is because they are afraid the points will come into play. IF YOU BELIEVE THE POINTS ARE GOING TO COME INTO PLAY, ALWAYS TEASE THE DOG UP.