Hi.
It's my understanding that the East Bay Vivarium Red Group boas originated from Jeff Ronne's line of Pastel Dream Boas. East Bay Vivarium started with a couple of Jeff's babies about 10 years ago. Over the years lots of new blood was added to the breeding project to create a separate line of pastel boas now known as EBV Red Group Boas. EBV was just selectively breeding for more red coloration. The red showed up in the babies and those were the ones that sold first. EBV's breeder adults weren't really holdback animals but rather acquired by accident -- the ones with the least red as babies were the ones that were left over; but by then they were already 4 or 5 months old and had shed a few times. EBV started to notice how much color was coming in after those few sheds and held back the animals. That was how the majority of the current Red Group breeders were acquired.
Red Group boas typically get redder as they grow. The color intensifies with each shed and generally peaks when the boas are young adults (3 to 4 feet). After that, they may tend to brown up a little bit but they do not lose all their coloration.
How do I know this? I recently bought a baby EBV Red Group male and did some research first.
Regards,
Bill