More than one sort of Dog?

Is this impossible....or have I just not hit the right combination!

I have been trying to get a different dog model to show for different factions, but have had nothing that actually works. Has anyone tried this and had it work?

Tried adding a new entry to descr_animal called 'newdog' with type 'wardog' and a new model, but all I seem to get is either a crash when it reads the file, or no new animal type appearing.

Could do a lot if I could make this work......

I have tried this before, no luck. I'm currently stuck with one dog type and one pig type. I worry that it might be hardcoded :/