16 month old not wanting to eat much...

my ds is 16 1/2 months old, the son of two chefs and an EXCELLENT eater usually. i can give him anything and all i get is "more...more"

but over the last few days/ week or so he hasn't really been wanting much at all.

Just wondering if this seems like the usual thing for a toddler?

Am i being a paranoid mother thinking i had the perfectly un fussy great eating child?

i'm sure if he is hungry, he will eat, but i just worry that he isn't having enough.

I can usually get him to eat breaky- porridge, oatbrits and banana, toast, but may have one or two mouthfulls of something for lunch and a reasonable ammount for dinner.

He just seems to want to drink- either milk or water during the day and i wonder if this could be a bad thing

thanks if anyone has any advice or has been in the same situation

x