http://zootubex.com/black-girl-fucks-with-her-black-dog/
There you are.
But be warned - it's a Zooskool movie at its worst.
Almost nothing but failed penetration attempts, or the dog pulling out after 1/10th of a second. Even the lady gets annoyed with the stupid dog.
At 14:42 there's 6 seconds of actual boning and at 17:06 there's 8 seconds.
18:56 has some good action.
And it ends exactly when they discus if they can get some missionary going.