So,  for example, if someone injured themselves on the property they would claim on the renter's insurance.

Such as his condition and whether he was badly injured or whether he is working.  

If the tenants, their children or pets were to be injured by items that the owner left behind for the tenants to use, the owner can be exposing themselves to litigation and lawsuits.

My husband is injured and we have service dogs.

I would never allow a tenant to do work on my properties, not only for liability reasons if they get injured; but, how could I hold them to the level of quality I expect. 

Neighbour As dog caused the fight, Neighbour A was injured as the result of a dog fight caused by the fact that their dog was not under control.

One injured or dead person (especially a child) that didn't have adequate exit or means of escape or lack of safety features etc. will bankrupt both businesses.

A guide dog for the blind is basically a dog that can do the same 30 tricks over and over again with 100% reliability (or a blind person could end seriously injured or dead).But, the flip side... is that they are very trainable dogs.

The criteria for taking a case involves somebody actually being injured and the other party having something worth going after.

Their credit was damaged when a spouse was injured in an industrial accident on the job and was unable to work while he underwent a couple surgeries.