Hi Inna I had that problem before and what really worked for me was giving the cats one food bowl each. I noticed they were fighting much more when around the food. So I put a second bowl about 3-4 feet away and that solved it!
What I’ve observed is that males are territorial. They tend to be more of this behaviour when there’s a female, and especially if it’s mating season. It’s their nature. Is the female’s hormones up?
In gardening, there’s always something you can’t control. This makes the experience so humbling. 🙂