Ziggy is very nervous when he meets someone new, he either flys for cover or attacks them. I never know which he's going to do. I always tell people to be very careful when they meet him, although with his nails trimmed real short now, I am not as nervous that he will injure someone.
Tardy has mellowed out in his old age, but he still has his moments. He use to be very aggressive also, but now he takes most everything in stride.