My 2 1/2 yr old SWCAH hasn’t been eating for about the past 4 days no fever or vomiting he’ll take a bite then say he’s full.  I asked if his tummy hurts and he says no.  He’s playing normal maybe a little bit more whinnie than usuall.  Any ideas? Should I take him to the Dr?  Wait it out?  He is drinking milk juice and water.