A friend of mine is experiencing some issues with low fertility rates in his ball pythons..boas and retics...2 years ago he was 50 clutches now hes had 5 good eggs out of 20 and his boas are dropping more slugs than live babies. Hes checked EMF readings and those are good..the rodent food hes been using for 6 years. Now some of his animals are sick... i told him to check his water supply..he has a well...and they are drilling/fracking his area. What compounds could cause this? Oh...he keeps these animals in different levels of the house too...i told him its got to be something more than bad luck....any thoughts?