In my reply to your post in the Herp Health Forum I didn't mention humidity. Lack of proper humidity can cause an URI with retics along with horrible sheds. What type of cage are you using? Heat emitters and heat lamps are great at drying out humidity rather quickly. The only heating devics I use with any of my constrictors is under cage heat. Bill
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...three years ago it was just another snake cult...
The Retic is King.
Anacondas-the other Dark Side.
Afrocks-the dark side of the Dark Side.