Pre, Post-

Obviously, a noun comes after these prefixes. Post-war, post-arrest, pre-murder, etc.
But what if the noun ends with ing? Do you still add the 'ing?'
For example, would you say 'post-kill' (which doesn't sound alright to me) or 'post-killing?'
Also, in elaborations (ones with examples in particular) on this topic of these 2 prefixes is greatly appreciated.

Get more input, because if you were getting more input you would see that phrases like "post-kill" and "post-killing" simply do not exist in the English.

http://www.antimoon.com/how/mistakes-in-learning.htm

English is a flexible language that is changing all the time. An expression like 'post-kill' might sound a little unusual, but I do not think there is anything wrong with it.

'post 9/11'

On the other hand 'post killing' does sound wrong.

Post kill tenderization of poultry meat through constant ...

An apparatus and method for automatically electrically stimulating poultry carcasses in poultry processing plants in order to tenderize the poultry meat are ...
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by BB Burnett - 1999 - Cited by 3 - Related articles - All 3 versions