I had the same problem with a Boa i bought a couple of years ago. It would go away, and come back. The R.I. interupted her breeding last year. At that point I had had enough. Here is a great read that Jeff Ronne started about Tylan and R.I.'s:http://www.boaconstrictor.net/forums/showthread.php?t=5124

I used some Tylosin I think it was called. Same thing as Tylan. That thread talks about it.
Anyways, the R.I totally cleared up.
The same female is being bred right now. The night time temps sometimes drop to 75f and she's healthy! Good stuff!
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Jason Dowell

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