Find out what the pet store was feeding it. Don't feed it pinkies, up the prey size, and consider feeding a live rat/mouse/asf. If the pet store was feeding mice or ASF there's a good chance it's not going to take rats if you're trying to feed it rats
It took me years to get some of mine off of live ASF and onto FT rats.

Go get a food scale from Walmart for $10 and feed the snake 10% of its body weight every 3 days. He sounds very young and if his weight is under 500g I would feed every 3 days.

My rule of thumb for feeding is generally this; 3 days 10% of bodyweight birth -500g, 5 days 10% 500 grams -1500 grams, males 1500g + 15% 10 days, females 15% 7days.



Sent from my SM-G920W8 using Tapatalk