Zookeeper's Lounge

I am stuck with unhappy Gorillas, well on tlhe list of animals it shows red (that they are angry), they are in a well suited exhibt, I have water to keep them in as they kept climbing out, but I think they have been unhappy all along. Despite this they have reproduced! Also the chimp is lonely, and ...

Has anyone any useful tips guidelines on this, I am finding it so hard, wish it was like ZT1.

Does anyone know what these are, I think they might be chipmunks, they are driving me mad! They remind me of the cockroaches in Sims. Are they supposed to be there, at first I thought a beaver had escaped!