you don't ..... but any deflection will be minimized because of all the lung the the North, South, East, and West of your shot

Whitetail ribs are not an obstackle to any well tuned bow and arrow combination. They're no problem to a recurve or long bow either with the right broadhead. It's a plus if you can slipbetween them simply because it makes less of a smack which I think sends the deer a little faster and further. If you are lucky enough to slip between them going in and out the deer just hear a noise and usually only take a couple hops before stopping to see what the racket was...... and then they fall over. Bust a rib and they always seem to run as far as they can before they smack into a tree or something and fall. But if you're in the ribs and out the ribs they aren't going far 99 out of a 100 times.

I think any hard place is an obstacle but with the equipment we got today i dont think we will have a problem with the ribs or sholder blades.

SO TRUE! I wish everybodywould follow that one. I'm a decent shot with a bow.I'm holding my own in our indoor league. And I can hit the vitals of a 3d target out to 50 yards consistently. But I have very little confidence shooting at a whitetail further than 30 yards. Too many variables that I can't control at that range. My recovery rate is 100% on animals shot at less than 20 yards. I love my chances at that range.

And no, I don't believe ribs are an obstacle - as you are pulling more than 35 lbs or so and avoiding strong quartering shots.

Have you ever seen a well placed shot bounce off a rib and fail to penetrate the chest cavity? I haven't. Ribs don't scare me at all.