I think you should be feeding a snake that small every 3-4 days for the first year. I'd try to feed several rodents back to back and see if he will eat 3-4 at a time, then slowly move up to bigger rodents and more frequent feeding until he gets some weight on him. He is way too small. Are you sure your scale is working, 130 grams and almost a year old?
Here's a ball python that is two months old and already weighs 100 grams. Look on Morphmarket and the hatch dates and weights, you are not feeding enough. A snake will grow as fast or as slow as you feed it, unlike any other animal in the world.
I'd think on average a snake that's a year old should be around 800 grams.
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