Broken tooth

I just noticed that Singa's lower left tooth (the long one) is broken off - it's maybe 3/4 or 1/2 as long as the other.
I do not know when and how it happened. She doesn't seem to mind, but I am worried that she may have a nutritious deficiency.

Anyone have some advice for me?

I would guess it was just broken when she bit something, knocked into something, or who knows what. If it was my cat, I'd just make sure the vet looked at it at his next check-up, if it didn't seem to be bothersome at all. But it wouldn't be a bad idea to call your vet up and see if they want to take a look at it.

I agree, if it's not bothering her then it probably isn't an emergency, but call the vet just to make sure and find out if this is cause for concern.

I would definitely ask about it at her next appointment. Broken teeth can lead to infection and can be painful (sometimes resulting in the cat not eating or eating less). If it is a possible source of infection, it may need to be pulled--Odo has only one of his fangs remaining because two were broken and the third showed signs of redness and infection.