She was having a lovely time exploring but, I noticed she was panting like a dog.

I've never seen a cat or kitten do this before (and I thought I'd seen it all with cats) It is very warm out but as I say, it's a new one on me.
Agatha is very bold and playful, eats well, plays and is otherwise healthy.
Anyone else ever seen this before and is it normal?
Thanks folks,
Grace
