at 8 weeks he should have been having it offered weeks ago.
you are lucky this poor little mite has not suffered
dehydration. i suggest giving him a bowl of clean water sort
of like NOW!! all the baby greys i have raised over the
years have been drinking fom a bowl since they were around 4
weeks, before that they got all the moisture they needed
from formula and a little sqwirt of water from the syringe
after each feeding.