all depends, they just have to pair =P. just leave them, my females don't really mess with anything in the tank, they just like to protect their territory. keep an eye on them if you start seeing damaged fins. males tend to be more aggressive during spawning to females that aren't interested in spawning yet. the pairing process usually works better in bigger numbers of fish and then you separate and sell non-paired or keep em like i do for the love of fish. chances are if they are the only female and male in the tank other than your silver dollars, they will try it when they hit maturity, which I'm sure your jd is already.