I love cats I have 2 myself strictly indoor. I have a bird feeding station in my yard. I have not had any issues with predators but today I noticed a gray cat hanging around. I don’t have a fenced yard and its not an option to get one but wondered if there is any kind of safe humane repellant I could use to keep him away but not harm the birds or the chipmunks. I can’t use a water hose because it would make a huge mess but didn;t know if anyone knew of a repellant for cats but safe for the birds and chipmunks and something that won’t repell them.