Every bulldog I have owned has been anywhere from a little shy to very shy or just skittish and scared of different things ranging from a man hole cover in the side walk to a weird shaped trash can lol etc. Mine have always been very loving and outgoing to everyone they knew ,but just very skeptical and/or shy of everyone else. With tons of patience and socialization they all came around and became well adjusted individuals.... well adjusted for crazy ass bulldogs that is lol.