The animal, and/or the Tenant can be removed if the animal creates recurring noise or nuisance.

Once you know that you can decided what a fair amount for you and them should be.Your second paragraph is absolutely true and really the end of it...remember she is renting a shared room in a 2 bed (I think) which is a slightly different animal.

I'd check with your insurance carrier on specific language about animals/dogs/pets.

Tempted to put poison all around the areas but I do not want these animals dying in the walls and smelling horrid!

Also be mindful of service animal regulations. 

FYI, emotional support dogs are not a legally protected class of animal and is simply a "certificate" anyone can buy online.

For example "No cooking grease, oil, animal meat bones, pasta, rice, any other substance down the garbage disposals except apple and carrot peels and liquids with no solid matter such as juice and soda" and "no vaping and smoking of any tobacco product, marijuana or any substance" on the property, including the backyard"  

If we don't get that from the tenant, we just give them a letter that their animal does not qualify as an ESA.Google "HUD guidelines emotional support animal".

If not - how do you all make sure the tenant has renters insurance, that it covers personal property, liability, and animals, and how do you make sure they don’t turn around and cancel it right after they move in??

A tenant brought in a pit bull as a ESA animal and got a letter to do so.Our rental agreement says no pets allowed.