Hello, I bought a 4 year old ball python about a month ago and he ate the first week I got him. but hasn't taken to any food I've tried to give him each week after. I am heard they can be picky but I am just worried in general. I just weighed him today and he is 1250 grams at 125cm length... I sadly don't have a weight of when I first got him. I have a temp range of 90-78F in a 40 gallon tank and 2 hides. any tips? how much longer till I should be really worried? his colour might be dulling abit so I'm currently hoping he is just shedding and doesn't want to eat in that process but idk...

Thanks in advance for your time.