JUst some randome thoughts,
how much is he fed soem veilds eat more then others mabey he is pissy because he is hungery,
mabey the cage is to low and he feels vonurble, they like to go high to feel safe,
constant changes can make them pissy as well my female veild hid in her pothos plant for 3 days when i removed a towel i had up on one side of the cage.
lighting, bad lighting bad colors...
veilds are not all bright all the time any way mabey its just his normal colors
little moo normal
http://oldworldchameleons.info/album...album=14&pos=2
little moo pissy at me half display.
http://oldworldchameleons.info/album...album=14&pos=0
lac of water/ humidity may also be a factor
and personality u just might have a pissy one, plain and simple. with my most grumpy man i put a big plant in his cage and he spends alot of time in it because it gives him good cover.
just some randome thoughts