I would be interested in hearing a more definitive answer to this, just setting up a shrimp tank now and a DP would make a nice addition, but I thought they would just wipe out a shrimp colony.
A DP in a shrimp tank means many of the shrimp offspring that you intend to breed will get eaten.
I keep various shrimps in my DP tanks and the populations of the ones that breed (cherries in my case) are kept in check since my DPs absolutely love baby shrimps. My DPs mostly leave the adults alone. They are too lazy to chase the faster shrimps
There is no absolute answer to whether your DP will attack juvie/adult shrimps or not since a lot is down to the actual DPs and also how the shrimps are introduced into the tank. And I can assure you that if they go hungry, they WILL attack even larger shrimps like amanos as this happened to mine when I went on holiday a few years ago

I would test with some cherries rather than CRS like pippoodle said.
Also, just for a bit of additional info, be aware of their diet and read this thread by NMonks.
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