I had two veiled chameleons turn black, purple and yellow when the hurricane hit in Florida. I was told the sudden change in barometric pressure caused it. Unfortunately both died a few hours later.
I just got a male veiled, and he flares up when I open the cage. He wont let my hand get close to him without hissing. What approach should I take to get to the point where he will let me hold him without stressing him out.