Aren't these already in the Monster Manual?
Dog: "They can also be used for small wild canines such as coyotes, jackals, and African wild dogs."
Horse, Light: "The statistics presented here describe smaller breeds of working horses such as quarter horses and Arabians as well as wild horses."
Hyena: "The statistics here are for the striped hyena..."
And the giant badger and giant rat are dire animals now.
We recently had a canine conversion thread were we sorted out the Wild Dog(s) and Striped Hyena, but they just haven't been removed from the list yet.
I don't know what the light horse is still doing there though, since it's clearly covered by the SRD.