Cedar fumes can kill.. not Cypress.. Cypress doesn't give off much of a smell really. I use Cypress mulch for my snakes and mixed with soil for my Savannah Monitor. Always have... always will...
As to one of the other posts of why Iguana's will eat dirt..There are 2 possible reasons. 1.. is trace minerals they may need in their diet that they can get from dirt. 2.. in their native habitat there are probably a lot of plants that have mild toxins...and like parrots from the amazon, they may make use of the dirt as a neutralizing agent for these toxins...its instinctive so they'll do it even when their diets don't contain those kinds of compounds and alkaloids.
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Lucien
1.1 Columbian Redtail Boa (BCI)(Sutekh and Isis)
2.1.1 Leopard geckos (2 Blizzards (Caine and Goliath), 1 Tangerine Albino (Tequila Sunrise ...Tiki for short) and 1 dbl. het blizzard x tang albino (Malice))
0.1 Savannah Monitor (Kiros)
13 rats
1 Gerbil
2 Dogs (Loki and Storm)
2 cats (Sahara and Hercules)