Not Eating Jerome won't eat breakfast.

Thursday, Friday, and Saturday morning my 4-ish month old little guy ate very little of his breakfast. Yeasterday he ate more of it, and today he ate about half of it--but almost none of the lettuce. He eats his supper, eats his pellets, and his hay. He still popcorns and runs around, and doesn't feel like he's lost any weight. At night he is always waiting by his food bowl. We haven't changed his diet--the only thing is he had an edible hidey house that he never chewed on until earlier this week, and I became concerned about the sugar amount in it (I researched the ingredients) and took it away.

Hs eyes, nose, and ears are not crusty, he doesn't have diarrea, and he's not coughing, sneezing, or breathing funny at all. I don't think it's a tooth problem (but I'm not a vet) because he ate an entire baby carrot yeasterday and that would hurt more than lettuce!

Is this something I should take him in for, or do you think he's bored with his standard romaine and leaf lettuce? Thanks!