The Addendum outlines proper care, vet / vaccination requirements, and behavioral expectations for the animal.

This is completely inappropriate and I have asked that Roommates A and C please write me an email containing all inappropriate behavior by Roommate B.

I think that painting it Neon yellow to fix your problem was a brilliant idea.Hi, yeah, thanks for the vote of confidence, I would have painted it hot pink with yellow polka dots but I time was of the essence and I went with the closest color that would go over the beige color of the house before I painted it, soooo the whole cost effective aspect thing was on my mind ;) however I did raise the  rent from the $600 to $800 which gave me an extra $2,400 dollars a year which paid for the new toilet ($70.00) and then some, I add a $50 yearly increase to my Sect 8 rental leases, this way the case worker who one must contact in order to implement an increase can reference the agreement and approve the $50.00 a month fee, in my experience the case workers don't like to give any rent increases if they are not in the original lease, a definite way to avoid a long drawn out battle of climbing the chain of command who really couldn't care less if you are the best landlord (not a slum lord) and discourage anyone who asks for an increase by forgotten return phone calls to outright indignant behavior, lies and so forth, Happy trails Brother 

We need to enhance our screening to include behavior criteria so that when get rid of the bad apples that we won't replace them with more bad apples.

But if they are only staying a few months, it’s not like a new lease is going to change any bad behaviors.

I personally witnessed some of the neighbor's bad behavior prior to leasing the property but I attributed the behavior to the idea that the house was empty before I bought it and that he would respect the fact that someone was now living next door. 

Leases contain clauses related to tenant behavior.

So the people that  genuinely need to get a tenant out have to wait ages and lose lots of money because of the volume of frivolous eviction suits brought by landlords who are really trying to get paid.Does that attitude work for the betterment of all, or are landlords by aggregate of their behavior actually shooting themselves in the foot.Here is an analogy for you. 

Keep in mind that - you stay where you focus - meaning if you're going to choose to direct you're attention and energy to what you think you're going to mess up that's where your focus and your behavior are going to stay.

It may guide tenant behaviors, but the ultimate responsibility is yours.