My new (and first) ball may have a respiratory problem. He appears to yawn frequently and keeps his head in a verticle position quite often. He spit up a yellow substance yesterday also-unless it was poop. I've had him 3 weeks and he has not eaten yet. All living conditions seem to be what is required. 80-85 degrees, 50% humidity, water, enclosure in a 20 gal glass tank with basking lamp. He is 18 inches long. This seems to be a great website. thanks for any help!