Comfort animal making too much noise

[Michael Van Brunt]

Thanks in advance to anyone who can help with this question. We have a tenant that has a comfort animal in a 4 plex. We just received a complaint from the tenant down the hall that the dog is howling, scratching on the door, and otherwise making too much noise for their baby to sleep. What recourse do we have in regards to a loud, disruptive comfort animal?