Hi @Steve4301
So sorry this happened...
1. You can ask Airbnb to remove a review you wrote for this guest:
https://www.airbnb.com/help/article/13#section-heading-10-0
"You can remove a review you published if it no longer reflects your experience as a guest or Host."
2. Yes, this negative review will affect Superhost status as you must maintain a 4.8 rating or better to retain Superhost:
https://www.airbnb.com/help/article/829
3. I would try to get the review removed. Worth a try at least. I would base it on the "72hour rule." Guests are supposed to notify the host and/or Airbnb within 72 hrs of discovery if they have an issue. I'm assuming they didn't notify you within that time frame of the issue.
Guests have 72 Hours to report an issue
https://www.airbnb.com/help/article/248
"You have 72 hours to report any issue to your Host or to Airbnb from the time of discovery."
You'll have an uphill battle getting the review by the guest removed, but why not try?
I'm not sure if you can edit a public response, but it's always best to be short, factual and non-emotional. You are writing it for future guests, not necessarily to the one who wrote the negative review. I always use the phrase, "we're sorry your stay didn't meet all your expectations...we have very high cleanliness standards as evidenced by our (add the number) 5-star reviews." Then if they never reported an issue during the stay I usually say, "we're puzzled as to why you never reported this issue during your stay so we could have addressed your concerns? I would also say something like, "we are equally puzzled as to why you would book an accomodation that states not suitable for those with pet allergies, since you state you do have sensitivities to pet dander
BTW, I have never heard that mice have dander and that people can be allergic, but I guess that is possible?