I know a lot about frogs.
I LOVE frogs.
And yet, I've never had one croak before!
Last night my Southern Leopard Frog, Comet, decided to croak for the first time ever. I've had him since June, where I found him as a tadpole in a feeder tank when I was working at a local petsmart. So, I figured, he's too young to be calling for a mate or anything. My question, then, is:
Why did he decide to croak?
Is he happy?
Is he content?
Bored?
Or just to scratch his throat? 
Thanks in advance- I'm really curious!
Oh, and also, how long will it take him to reach his full size of about 3 inches? He's not quite an inch long as of now.
Comet before, and after his adorable transformation:





