Neighbour had two cats that between them dragged a squirrel home. The blood stain on the conservatory paving being a lasting memory of that. Also depends whether they create their own territories.2 Cats is good for birdlife, The Cat hunts alone but if it too busy watching for potential attack it cannot devote as much time to the hunt, as an owner of multiple moggies they spend more time watching each other (when not asleep)
Keeping them 'well fed' with permanent access to food (dry Kibble) also helps.
For some reason thought it was Sunday
Bit of a shock just after 8 when I realised it was Tuesday.

Then next week just a dental check up.