Am I responsible for my renter's dog if it bites someone?

Question Details:

I own a home, completely paid for. I am about to rent it out to a lady who owns an outside dog. He has a long chain to reach the many shade trees I have out back. There's a lot of land with my home. He also has a dog house. The problem is, that this dog is mean and will bite anyone he doesn't know. The owner of the dog failed to tell me this before I told her to go ahead and move the dog on my property before she gets moved in. I am worried that I may be responsible for the dog if he bites someone, or causes a wreck on the highway if he would happen to break the chain. I do not own this dog.

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