Why the t-rex arm?

It's supposed to be a fox paw. But perhaps they're small because her body redistributed all the meat to her hips and tits.

finalagent said:
Why the t-rex arm?

She's midway though transformation, she's probably still in 4-legged stance.

What is the name of the doujin?

Does anyone know what this doujin is called and/or where to find it?

Instantly made me think of MGQ.

Foxy