Hi Tatiana
We appreciate your feedback! I will make sure our development team is aware of your post.
The Cattery should only send a notification once every 12 hours (and only if there are live cats in the Cattery.) If it seems like the notifications are building up, there's a few things people can do. Storing cats in an alt's Cattery under a different email might be helpful. Setting a filter on email to automatically archive/delete Cattery messages could also help.
I realize this may not be an ideal solution to this issue. It may be that implementing a feature like this isn't as easy as one might think, But it's certainly something we can look into going forward!