A sudden scratching could be heard beyond the tavern door. 
An agressive constant hasty grinding against the grained wood.
It quietened... Then was followed by a loud heavy thud. 
A few more scratches but when the doors sturdyness prevailed then the noise subsided and disappeared.

Moments passed before the soft thudding of padded feet tore across the floor behind the bar and a large white wolf threw itself over the counter to come crashing down in a blur of bright blue eyes, limbs and fur, right beside Cal.

There were no initial signs that it was agressive. It merely sat proudly with wide powerful shoulders and an intent intimidating gaze.