How to deal with dogs?

[David Haley]

We own College student housing and daughter lives there with her friends. We stopped off to drop off items to for our daughter and it’s pretty evident that a boyfriend and his dog are the now staying there too. We spoke to her, she denied it all. We sent nice email reminding her to follow terms of lease. Now what? She says we can’t stop in unannounced per the lease. How can we ensure that the boy and his dog actually leave?