In general, that ones that aren't going to make it stall at under or around 50 grams. Once they've passed the 50 gram mark and are steadily gaining weight, things should be okay.Can we have a pic? Presumably you got a hatchling.... For those with more experience, when has the most vulnerable time passed for a Leopard, past when it is likely to live to adulthood?
Their most vulnerable time is right after hatching. Most breeders keep them too dry, outside too much, and don't soak often enough. They are really very sturdy and hardy if they are kept warm humid and hydrated in their first few weeks and months.