Quick feeding question

Should I feed a 9 month old BP every 7 or 5 days?
I'm feeding every 7 days, just wanted to check.

Thanks

Every 7 days is just fine, though I would go more by weight than I would age. How much does your guy weigh?

I fed my babies every 5 days until they were around 150g and taking rat pups. After that, I slowed them to every 7 days.

I don't have a scale yet. :/

Thanks, maybe I should be feeding him a bit more, I was asking since he starting to look a 'little' thin to my eyes. He's not 'rounded' like a lot of BP's I see here.
I feed him 1 small mouse every 7 days. I tried 2 smaller mouse last feeding to see if he'd take it and he did.
Perhaps I should be feeding 2 small mice every 7 days?

Here's a pic from a few weeks ago:
https://ball-pythons.net/gallery/fil..._009_thumb.jpg