Asking for pet rules

[Yenlan Patton]

My husband and I own few houses for rent for additional income. We have 2 family moved in few months back at our properties. These 2 family have the same issue…"sneaking" the pet while they signed without pets. One family agreed to deduct from their deposit. But one lady who live on our other property claimed that's her daughter's dog only for visit.her daughter visit a lot and bring the dog with her. I addressed this with our tenant and she started complain about the house conditions such the carpet, window blind etc. I gave her the paper list but she hasn't returned it to me. Today I was in the area and swing by for pick up pot plants because its freeze tonight, I saw the front door open so i knocked, saw the dog again. I know it's a small dog, maltipoo breed but the fact she let her daughter bringing the dog to the house without our knowledge. What should we do?. We are a small business owner, with all the maintenance and labor cost uprising and we are charging rate under market value to help, this kinda slapping our face.