Sorry to post in an app that isn't mine, or the fact that I am not an admin, but just gonna make a suggestion: No need to code or add a new model, it can be RP'ed, all u need to do is take a few small props, weld them together, use the color tool(or the material tool and look for a texture that seems to resemble fur), add a physdesc, and walla! you have a dog! To move it, just use the physgun, and maybe even RP the physgun as a leash.
Well I'm fine with whatever. I don't care if I get the dog model or not, I just think the RP would be good.