We have a “lollypop” red robin, but prefer a lower bush shape. How drastic can we be in pruning this into said resultant shape?

We have a “lollypop” red robin, but prefer a lower bush shape. How drastic can we be in pruning this into said resultant shape? Can we cut down to below the current lowest branch, or will this kill the tree?

Re: We have a “lollypop” red robin, but prefer a lower bush shape. How drastic can we be in pruning this into said resultant shape?

Reply from Carol

Does it sprout from lower down?
I had a lollipop bay that sprouted and is now a bush. If you trim it hard in the lollipop shape that should stimulate any potential lower growth too...