Similarly, there are multiple "prevent cattle from straying" spells. I can't haelp but notice there *aren't* any love spells, or even any "predict who you'll marry" spells; I'm guessing he considered those unlawful magic. As you said, though, the dog spell could be adapted pretty easily, and perhaps it was.

The anti-slander manoevre (hard to call it a spell when iirc it's wordless) really intrigued me.