You know he propably is scared of the colour orange. I don't know if dogs can see colours but I think they can. I think my dads dog is scared of the colour red. Once there was this woman getting out of the car with red pants and she started flipping out on her. We thought it was nothing but then this other time these people were walking by and wanted to pet her and were carrying a red bag so when they went near her she started backing up and trying to run away. It's weird, but I think they can see colours.