Contrary to others who voiced their opinions here, in my opinion, the only thing you should be concerned about is the potential damage to your property. To deal with that take an open check to be cashed at the end of the lease period if damage was actually caused. Of course you will have to clearly state what you consider 'damage' as apposed to the regular wear & tear. The best thing would be to agree upon a specific arbitrator to settle any disputes.
Laws, regulations, ordinances and animal welfare are none of your concern.
I disagree with the last statement. As a land owner, with a tennant, I think the land owner is partially culpable if the tenant is causing any of these violations. Animal neglect sets the animals up for some pretty serious disease issues. As a land owner, I would in no way, shape, or form allow a tenant to break any of these moral or legal codes of conduct.