You shouldn't be feeding twice a week. Either a pinkie or 2 every 5-6 days or larger items weekly if the snake is larger. This is the guide I was given by Okeetee Mick when I joined:
Single pinks 6 days Snake = 4-15g Large pinks (2pink) 7 days Snake = 16-25g Fuzz (5-6g) 7 days Snake = 26-40g Small (8-10g) 7 days Snake = 41-80g Small x 2 (8-10g) 7 days Snake = 80-120g Mouse (18-20g) 7-14d days Snake = 120+g
Adult females after bromating are fed every 6-7 days. Adult females are fed every 7 days. Adult males are fed every 10 days.
I would not feed him twice a week and use the advice smart bunny gave above. If you feed Thursday and Sunday he will only have 3 days in-between one of the feeds and it can take that time to digest. They tend to grow quicker when they move up a size of mouse.
feeding him twice a week is classed as power feeding which can cause trouble later on. its un natural for them to eat so often and theire stomachs to not have enough time to recover.
one pinky every 5-6 days is plenty.
theres no need to hurry his growth x
1.0 western hognose (hero) 1.0 phantom reverse pin dal brindle crested gecko (goyle) 0.2 red dal red harly (sprite) 99% full pin Harley crested gecko (TuLong) 0.0.3 miomantis paykullii 0.0.3 Bombina orientalis (oriental fire bellied toad) 0.3 fancy mice (snap, crackle and pop) 1.0 yorkshire terrier (jasper) 2.1 cats (echo, shadow and pokey)