Do yourself a big favor and skip the problem feeder. Once snakes hit the 300gram mark they can easily gain 100grams per month if they eat every 5 days or so. I know its hard when you want to get going on breeding but really look for a quality animal from a good breeder. Not just a lesser with size, but a lesser that makes you go "oh damn, thats a nice lesser". It will pay off down the road when trying to sell her offspring. Selling snakes isnt as easy as people think and you should breed only great examples of the gene and not rush in with ugly ducklings. Any reason your looking for a lesser specifically?