On the other hand, some think that lunar zoomies are very real. Many wild cats are crepuscular, meaning they are most active at dusk and dawn. What we do know for sure is that during a full Moon, cats have more accidents, and we’re not talking about the litter tray kind. Compared with other days, the risk of emergencies on fuller Moon days (defined as ‘waxing gibbous’ to ‘waning gibbous’) was 23 per cent greater. Waxing Gibbous and Waning Gibbous are, incidentally, the names of my two rescue cats.