Sheree... if he's hungry - I'ld feed him. He will put on some decent weight. Avoid potato as that tends to 'block him up'... but if you have a variety of fruit and veges he should be getting fibre to keep him regular. Try to keep giving him as much fluids as possible.. ideally milk, but water if he's not keen on his milk. They say you should try the milk first, then the solids....

Has he been passing bowel movements okay?? Just keep an eye on them. If you are concerned, feed him all he will take; then call your maternal nurse on monday...

I'm sure it is fine to feed him - as it's not like he's going to become obese overnight!

Happy for you!