Pipes, like SH, eat pods and small shrimp, such as small ghosties. They will eat every pod in your tank in short order (we had a pair of D. janssi wipe out a teeming fuge, but it got them over the hump so we could wean them).
You'll eventually want to get your pipes weaned onto frozen mysis. Buy the brands that look like whole shrimp, and not the brands that are typically pieces (Hikari and PE are good brands, but PE are pretty large as far as myis go).
If you have berried female peppermint shrimp, they will likely engage in an interesting behavior...they can actually pick the roe off of the shrimp without harming the shrimp...it's pretty weird to see.
HTH