The we’re using the litter tray quite happily and then I couldn’t get my usual litter. We have also had a couple of unsettled weeks; first happened when we were out and a baby sitter here, then when we were away and the neighbour fed them and now fireworks going off every night, Husband is very pissed off and I am getting the brunt of his frustration despite me scrubbing, cleaning and using fabreeze to get rid of the smell. How Can I stop them doing this?