If you have been threatened by your landlord with eviction over claims that you have a dog in your rental when you do not, I would write your landlord a letter stating forth your position keeping a copy for future reference and need.In the letter I would also ask for information as to the three (3) witnesses who supposedly saw a dog at your unit within the past month as to their names, telephone numbers and addresses. Other than the above, there is nothing really what you can do but wait and see what your landlord plans on doing concerning you and your ability to continue living in your rental.