If you dream of animal taxidermy, its dream interpretation can mean you are hounded by memories of hunting animals. If you were not a hunter, then maybe you saw these taxidermy somewhere. You might have felt guilty or sorry for the animals who were killed and then preserved. You had an association with taxidermy, which created a memory that was recalled for replay in your dream.
If you have a pet who is sickly and maybe terminally ill, you may have thought of animal taxidermy as a method to preserve your beloved pet after its death. You might have felt strongly about this and that could have triggered this dream about animal taxidermy.
Dreaming about a certain theme can be a way of your inner consciousness sending a message to reinforce the theme/ subject matter. Since you have a strong opinion of this matter, you should take steps to follow it through.