Digging water

The exact reason why some Maine Coon cats do this is not entirely clear, but there are a few possible explanations.

One theory is that it's an instinctual behavior that dates back to their ancestors, who were skilled hunters and fishermen. 

Digging in water or splashing it around could have helped their ancestors attract fish or other prey to the surface, making them easier to catch. 

Another theory is that Maine Coons may simply enjoy the sensation of water on their paws and enjoy playing in it. 

Some cats are known to be fascinated by water, and Maine Coons may be especially predisposed to this behavior due to their thick,

water-resistant fur. 

Breaking ice crust before drinking, on the other hand, is a behavior that some animals exhibit when they need to access water that is frozen over. In the wild, animals may spread out fallen leaves and whatnot to create a clear space for drinking water and to avoid ingesting any debris or contaminants in the water. 

While domestic cats like Maine Coons are not typically exposed to these types of environmental factors, it is possible that they may exhibit this behavior as a natural instinct or out of habit. 

Overall, the behavior of Maine Coon cats digging in the water and spreading out leaves and sticks before drinking are not directly related, but both may be influenced by natural instincts and behaviors. 

Ultimately, the exact reason why some Maine Coon cats dig in water may vary from cat to cat. 

However, it's generally considered to be a harmless and endearing behavior that many Maine Coon owners find entertaining to watch.