Feeding at 5 days is not dangerous but I would not feed on a consistent 5 day schedule. I prefer to vary my feeding schedule and will feed 5 days then 7 then 5 then 8 and so on, I don't feed on one night of the week.
With varying feeding you're able to get more food in them without fattening them or rushing their growth. I believe feeding every 5 days year round would be overfeeding and fattening without benefitting and therefore have never done it.
My snakes are gaining weight well and are not fat and seem to be quite content, they have yet to fast