When you have a point that you have tracked in the Movie Clip Editor, you generally use it to solve camera motion. Occasionally, like in a VFX scenario, one might deploy a style called Two-point Motion Tracking. This uses two tracked points, reconstructed as empties that will move on an X/Y Plane. In the linked video, the narrator goes on to show that if you have a dowel rod with sharpie at the top and bottom (points for tracking), and you track those points, you can stretch a glowing cylinder between them and make it look like the person is wielding a lightsaber.
In your case, you will probably be looking at a type of One-point Motion Tracking, except with multiple one points for each scenario.
- You will want to be happy with your camera track. After tracking the animals, re-solving the camera motion will be a pain to not possible.
- Track an animal.
- Go to Bottom toolbar > Reconstruction menu > Link Empty to Track. There should now be a Plain Axes Empty connected to the Camera by a dotted blue line.
- In the 3D Viewport, switch to Local Transform Orientation.
- Move the Empty as close or as far away from the camera as needed (probably along Local Z).
- Parent your animal (I assume) to the Empty.
Hope this helps and happy Blending!