"Worrying is like a rocking chair, it gives you something to do but doesn't get you anywhere" -Van Wilder With that being said, renting a home is investing, like all investments there is no guarantee of a good return. the only things you can do are a) keep some capital in reserve for emergencies b) screen screen screen c) diversify with multiple properties d) realize that you are only human and you will not make the best decision 100% of time...you cant always win, that's why you should hedge your risk with strong cash reserves just in case. good luck to you!  

A verbal warning is always better than formal action.Be a human first in all interactions.

No code states that a landlord must give preferential treatment to any protected class.Our human rights laws up here are very similar and the fact is that discrimination is impossible to prove if a landlord is diligent in maintaining their screening standards.  

And it's up to the human to clean their cages, and they may not do it regularly.So, guinea pigs are not better than dogs or cats, in my opinion, and may, in fact, be worse.Although, the same is true for cats that I mention above.  

Pets are animals not human family members and should never take priory when making real life decisions.

They must care for the pet according to recommendations of the AVMA, AKC, ASPCA and Humane Society.

Rent prep seems to be good in many of the tenant checks and I like the human touch they use.

No evidence of animal or human waste on the walls or floor;11. 

By responding to the human need, we have built good will and loyalty.

And as of right now, it seems like all of this is legal because of San Francisco's inconsistent rent control ordinance.You can read the article here: http://blog.sfgate.com/ontheblock/2015/03/16/san-f...As a human being who can empathize with others, I balk at this way of doing business.