trying to get ball on rats

so i fed my baby male ball about nrly 2 days ago now and he took it but some people suggested he was a lil underweight 73/80 grams and hes about 6-8 weeks old im not sure wether to wait 3 days so its 5 days or do it now and try and feed him a rat pinkie any advice?

So wait 3 more days to make it 5 days
or feed him today? which would of been 2 days since last feed

thanks

anyone?

I wouldn't feed him any more then every four days.