I've been thinking about this, but should some of the animals really damage the fences and walls? Some of these should be straight nullifying the effect of an animal. Or force them to detour (which would be hilarious, and maybe work to increase cooperation).
I absolutely do intend to have animals behave in a less straight-line-only way, but that requires extensive changes to the server that I just can't do right now. But yes, using fences to channel animals towards your opponents will in the future be a viable strategy.
