You cant feed dubia nymphs to hatchlings. Easiest way to start getting pinheads is give a month ahead, then buy at least 500 adult crickets online. Put wet coco fiber in a couple of butter tubs and keep the cricket bin warm with a UTH. put a section of egg crate accross the top of the butter tubs. After 2 days, take the tubs out of the main bin and put them in another empty bin and put a bunch of toilet paper rolls cut in half but leave one full size leaning on the tubs with a piece torn so it sticks into the coco fiber so the pinheads can get down out of the tub by climbing the toilet paper roll. If you keep the eggs warm with a ceramic heater and mist them a couple times a day so they dont dry out, they will hatch quicker (within 2 weeks). Put a little pile of cricket crack or flukers and either water crystals or fresh fruit/veggies for moisture for the pinheads. I have done this several times and saved tons in pinhead costs. Newborn panthers can actually start out on 1/16"-1/8" circkets so if you hatch your pinheads out a little early they will still be fine.