Baby refusing to eat

He is 3 months old and hasn't eaten like normal today. He normally eats 3 oz every 2 hours. Today he has been eating every 3 hours, or longer with "snacks". He doesn't seem dehydrated. He doesn't have a fever. I just wish he would eat like normal. I thought maybe he was hot so I laid him in his crib with the air conditioner on in his room.

Should I call the doctor?