Another ESA question...

[Craig M.]

Aloha from Hawaii.  Sorry for another ESA question.  I manage a building with 10 2/1 apartments with a no pets allowed policy.  I have a tenant who moved in a month ago and brought in an ESA pig right after lease signing, not a word about it prior.  She has the proper documentation which I confirmed with her doctor.  They are on a month to month lease so I can legally give them 45 days notice to vacate for no reason which I am fixing to do.  They seem to be a very smart and sneaky couple and I get the feeling they'll be upset after I give them notice and will go after me for kicking them out due to their pig, or any other reason they can think of.  My question is, do I just give them notice and tell them it's not working our for me then just keep my mouth shut until they leave?  I know I can't say anything about the pig but I also know they'll keep pressing me for a reason why.  Is there a better way to handle it?  I don't want to be in a shoulda, coulda, woulda, situation after the fact so I'd appreciate any advice.  Thank you.