My girlfriend sewed a collar for her cat out of a colourful patterned fabric, and also added a fringe of metallic, very reflective material to it. The collar se

My girlfriend sewed a collar for her cat out of a colourful patterned fabric, and also added a fringe of metallic, very reflective material to it. The collar seems to help a lot — he's no longer able to catch any birds, which are apparently highly attuned to bright and reflective colours (though rats aren't a problem). Highly recommended.