I just got a 2 month old ball python about a week ago. I'm really concerned about him as he is very inactive and feels quite 'squishy' as if he has no muscle. I thought this was normal until I handled a friends ball python which is a little older than mine and noticed her's was a lot more muscular feeling and quite strong. (I hope this makes sense)

This is my first time caring for a ball python so i'm not really sure if this is normal or if there is a problem. Could anyone help me out?