Stubborn Baby!

Ian is refusing the bottle again! Yesterday I was gone for about 5 1/2 hours and he barely took an ounce. Today he didn't have any milk for almost 10 hours! He ate a lot of cereal this morning my mom said, but still, I can't believe that he didn't have anything else! He refused the bottle all day. He wasn't fussy or anything, except when my mom tried to give him a bottle and then she said he screamed like a mad man! What am I going to do with this boy???