Took this shot at the Moscow zoo.
I was very happy with the enclosure the wolves were in, it looked very natural and had no bars- only a water canal which surrounded the enclosure.
This gray she-wolf was so curious. I took many photos of her, all with different expressions. I might upload another shot of her later, along with some adorable polar bear cub photos!
This photo can be used as a reference, credit is optional [but please do show me the end result!
As for stock, send me a note and I'll send you the high resolution file without the watermark, credit is required.