Just keep it dry and clean and your snake neonates should be happy and do fine. You would want to stay away from resinous woods like cedar and walnut. I would disinfect the wood at regular intervals. Wood can support bacteria growth. Generally, when the temperature gets low enough to use a heat source to keep them warm, it's time to hibernate them. That's when I put my snakes down. If you have a snakeroom or can put the racks in a room that you can control the temp. you should be able to control the temperature of the room itself to be fine for the snakes. A heat source on the back of the rack would be used to make one side of the enclosures a higher temp than the other. That way the babies and juveniles can go back and forth to thermoregulate themselves. Generally that's the purpose of a heat source. So, I would go ahead with your plans to put the heat pads on the rack. If not, I would think to run a piece of peg board down the backside of the rack. Pegboard still allows air flow for ventilation and blocks off the back to give the babies a secure feeling. I would think that leaving it open on the front and back would be stressful for the babies. Just a thought and an observation. I'm not saying its right, it's just what I would do. The rack in the pic is far better than most. The heat pads aren't to keep them warm. You keep them warm by keeping the room they are in warm. Keep an eye on any of your babies that may want to rub their nose on the screen. It's not good for the rostral scale of pituophis. Congratulations and its nice of you to build your babies a new home. It seems Del and I have to build a new rack system for each of our places each breeding season. I need to build another breeder rack.
>>This is a new rack I built for my babies,got the idea from pic's on another fourm.Lots of ventilation with the screen tops.tub just slide in and out.QUESTIONS,I got in such a hurrie to get this up cause my babies just shed[1st]I forgot to stain it ;is this wood kiln dried douglas fir ok the way it is.Also my house has been staying about 80deg with the heat wave up here and was wondering if there is a need for additional heat.I'm gonna heat this with two heat pads down the back,but didn't want to use them know with the hot weatherTHANKS ALOT P-RAT
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