Holy shit, how did I miss that!? As a fellow reader, the only way I could think that makes sense is that the MC is under a lot of stress and is having a lot of new and bizarre things thrown at him all at once. Having him think about it only after the fact could be an easy fix. Like " oh shoot dogs can't have chocolate! Can Timber have chocolate!? Oh no I'll have to be more careful in the future and maybe ask Timber about it." Or something like that. You get the idea.