New Tenant Turned into "Cat Lady" renting a Shared House- advice?

[Heather O.]

New Tenant signed the lease stating she has only 1 small dog, now she has brought home 5 cats to the Shared House she rents.  Other tenants are highly allergic, as am I.  She also forgot to pay rent, so I am thinking 3 Day Notice on Rent non-Payment is best?  It's complicated because she signed a lease for one property and then decided to move into another and when I was updating the lease I learned about the issues and now it seems like we should part ways.