The exhibit looks really great!!
But i also think a different set for the gallery would be a good idea. it doesnt really fit in there. I would suggest the wooden one that looks like the wooden barrier. You should also add some more contours/deep to the gallery itself. Especially the corner in the front really needs some improvement/highlights.
The exhibit itself looks way better! i like the ferns, use them a lot by myself too. Do the wolves (or at least the puppies) climbed/run above that broken tree on the sea?