When the hissing or growling starts we shout the aggressors name very firmly but it seems that with old age they are all a little deaf other than when you call them for their food.
So I have decided to make a load of crochet balls and place them strategically around the rooms as ammunition for stopping things before they get out of hand.
1 soft crochet ball on the boko should put an end to it and peace will be restored.
p.s. We have an appointment at the pharmacy for mid oct, thank you for all of your suggestions.