We have usually let the rabbits exercise daily outside their run in our rabbit-proofed garden. Have never before noticed cats roaming in our backyard. Until today. Bunnies have hiding places as well as their hutch but were very scared by a visit from a cat, which I chased off. Are cats a real threat to bunnies? Is there any advice to deal with this? I would like to let the bunnies roam free in the garden, which they seem to enjoy, but am a bit worried by this event. Thanks for any advice.