How do you reconcile these two statements you made

snip "Vertebrates are much harder to digest than insects, thats for sure."endsnip

snip "If bones are easier to digest then chitin, then one plus one must be seventeen"endsnip

snip "And chitinase isn't found in ANY animals. It is found in some bacteria and some plants!"endsnip

First you say that the skeleton of vertebrates is harder to digest that chitin then you point out that only bacteria and plants (which is incorrect by the way see my other post titled "care to try again" which is saying that horned frogs don't have chitinase which means that they cannot digest chitin...
So how can vertebrates be harder to digest if the frog cannot digest chitin?

Ed