Tenan't Dog bite her own kid- Liability?

[Eve Oliver]

I have a tenant that has a Ridgeback mixed with Visla, the neighbor is giving me a hard time because he wants the dog to be removed from the property since he found out the dog had bite the tenant's kid on the lips while they were playing.  The dog is a sweet dog, the neighbor has a dog as well and we have a fence. The tenant has a Pet Addendum and active insurance policy.  What's the best way to handle this situation? Remove the dog just because the neighbor is asking to?  or it's a liability to me to allow the dog to stay at the property?