What can i do to help my 8 day old son eat less but not feel bad about it?

my son eats 4 ounces of bottle feed milk and he eats every hour. he spits up twice a day at the most. i told the wic dietitian this and she said i need to feed him less. but i let him eat till he pushes the bottle out i hate taking it from him. is there a way i can feed him less and not feel so bad?