If it is a Ribbon Snake you will want to stick with feeder fish. Ribbon Snakes are not known as worm feeders. Be careful when feeding them together as they will fight over food and fatalities can occur. They can be removed from their mother immediately as her job is finished and the babies are on their own. Some baby snakes will fail to thrive but most breeders begin selling their babies after they shed and have eaten a few times.
You may house them together as long as you watch them while feeding. It is problematic especially with a larger number in one cage. Supply them with a water bowl for soaking and a rough object like a rock to help them shed. Humidity is not apt to be an issue.
If yours is a Western Ribbon or any other species native to Colorado it is illegal to sell them without a permit. Another problem is shipping. It will take a few months to set up a shipping account with FedEx to be able to ship snakes. Air carriers like delta dash are very expensive. It is illegal to ship snakes through the post office. It is against their policy to ship them and you must accurately label the package regardless of what carrier you use.
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Randy Hallman
Firehouse Herps