A Yorkie that had a litter of 7? Obviously it happens, you just never hear about it.
You know what? If he's got an appetite and he's not over weight right now, I'd offer him more. Maybe a full cup a day if he's active. A lot depends on what you're feeding too.
Either way, it doesn't sound like there are any red flags indicating that he's in ill health. But if you're concerned truely, take him to your vet.
