Likely a picky rabbit that likes celery but not the leaves.
And please don't shout, We hear you just fine.
Linda C

I haven't had chipmunks chew the hosta, but I have seen them chew other plant stems when the weather is dry and they can't find moisture.
Pam

Stick your fingers down into the soil around the perimeter of the crown. If you can do so easily, and find the roots chewed up, and perhaps even a little burrow around the perimeter, it's voles. Another way of doing the same thing - grab the remaining leaves at the base and give a firm but gentle tug. If it lifts right up out of the ground it's voles. You'll probably find most of the roots vanished, and gnaw marks into the crown. They gnaw right up to the petiole where it connects, and the leaf just falls to the ground, which could possibly match what you describe, in addition to rabbits.

Sounds like others have had bunnies snack on the petioles, huh? I have seen many bunnies hop through the yard. They love flowers but AFAIK, I have never seen bunny hosta damage in my garden. MAybe they just haven't discovered hostas yet?!?

Also, I've also heard that cut worms can cause a pattern of damage similar to this, but I've never seen 'em.

Let us know what you discover!

I hate to hear of anyone's hostas being taken out by the wildlife (or anything else, for that matter) but the talk about bunnies snacking on the petioles made me think of this post from a couple of weeks back. Weed found an absolutely (but oh so true) article and shared it with us here on the forum...

Here is a link that might be useful: Bunnies

Thanks everyone. Bunny WAS the problem caught him late yesterday eating one and again early this morning. My English Shepard had a bunny breakfast.
While watching Hostas last evening watch 2 does walk within 10 ft of several hostas sure hope they don't discover them.
Again THANKS EVERYONE!!