25 gr is a rat pup (by weight). A two day bump is about right. Not seeing the pictures yet, I would feed rat pups or small-med mice. As for feeding 7 or 10 days, larger meal would be more time but I like 7 days till the snake is 250 gr. If the bump last more then two days make the next meal on day 10. If the snake refuses a meal (at 7 ) wait three days an try again. If the meal is refused at ten, wait seven days or more. He'll eat if hungry (yes, I'm mean).

Your coming on Winter so growing an weight gain maybe slowed. As long as it's not losing weight your fine. As I posted above, smaller meals means offer more often. Like when you mess up an order 30 rodents the wrong size (small). The bad about feeding every five days is no or little handling time.

Waiting for pics.

Good luck!