` That is a question I cannot answer. I would be suspicious of anyone who said they could, unless they had the individual snake in their hands. As I said, I got into Anacondas because I encountered a group of babies which were unusually calm and gentle by chance, and I had the chance to pick out the tamest of those! Usually, baby Boids are nervous and defensive. Their instinct tells them that they are delicious, and just bite size! I wouldn't judge a snake's potential adult behavior by defensive juvenile behavior. I have, however, seen baby Boids that were just too aggressive for me, and seen them grow into overly aggressive adults.
` If you're going to buy by mail order, you just have to take your chances. It just depends on where you're located. I am in a remote, rural part of far Northern California. I got lucky with the Anacondas. Last year, I mail ordered a hybrid, pastel baby Boa Constrictor from a private breeder in the San Francisco area. He sent me a chubby, healthy, beautifully colored baby female. I got the breeder I wanted, but as a pet, she is a high strung, defensive little cuss. She will be valuable to me as a breeder, but when she's 8 to 10 feet and 35 pounds or more, she will be a handful. I'll never be comfortable taking her to show at schools, as I do with the Anacondas. The last thing I want is to have someone young and impressionable, who I am trying to educate, get tagged. I just don't worry (excessively) about that with the Anacondas anymore. I've had kids slap them and jerk on them, and they just retreat.
` It is important, I know, to have a tame pet. I may be able to put you in touch with someone at NERD who might be able to give you some personal service. This forum will allow you to contact me privately. If you wish to do so, I will try, and see what I can do. No promises, however.
` To answer your last question, my Anacondas were not at all aggressive during mating. I put the camera right on them, using two flashes, dozens of times, for the month they were mating. The male would even investigate the camera, and sniff at my face, while he was busy at the other end! It was amazing. I even added a second male, which caused some shoving and slapping, but nothing more. When the second male was added, the first would completely wrap the female's tail, to keep the other male off of her.

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To Buddhist hot dog vendor. "Make me one with everything."