My rabbits are outdoor rabbits. The crows do not act against them.
But when my rabbits (daily) leave their enclosure to roam free in the garden, the crows want to get into the enclosure to steal the rabbits' food.
The "door" to the enclosure (opened in the morning, and closed in the evening) is an around 30x30cm wooden square with (stable) mesh wire in it. In the beginning I took this square and placed it out of the way, most time on the roof of the enclosure. Then I noticed some crows, that tried to enter the enclosure. So I decided to not take the square away, but instead open it and lean it against the door frame. The rabbits could "dive" through, but the crows could not "walk in". This worked for a couple of month now.
Yesterday in the evening I noticed that the door square lays on the ground, and today in the morning I saw again a crow, that was stalking the rabbit enclosure. It becomes autumn here, so I assume the crows are more hungry than in the summer and search more actively for food.
How could I "defend" the rabbit enclosure against crows? (But the rabbits need to be able to hide there anytime.)
(Today I found a great tit inside the enclosure... it did not find the way out until I helped it...)