It sound like this dog is not getting the attention it needs, certainly according to the document I posted.
Bear in mind that there are provisions in strata law to have a pet for which permission has been given removed if it proves to be a nuisance.
These people just haven’t done their homework so if they end up having to move or find a new home for the dog, that is really not your problem – and you could be doing them and their puppy a favour.
They are clearly thinking having a kitten will be a companion for the dog. Again, according to what I’ve read, that could turn very nasty very quickly.
I wonder if trying to organise an “intervention” with the RSPCA might head off problems later.