I had my beardie outside in the grass (on his leash). When I was ready to go in I went to pick him up and he puffed out and ran. I didn't chase him, but I didn't let go of the leash. Every time I would try to pick him up he would puff out again. He got to where he was turning toward me and opening his mouth in a threatening way. I took it as he liked being outside and did not want to come in, but I could be wrong. Is this normal behavior?