Is there any reason beyond religion for Kashrut (the Jewish dietary laws)?

I had a discussion with one of friends, who does follow those laws, and I did learn a lot. For example, apparently giraffe is considered Kosher! :P

Anyways, we came upon the question of why the laws are followed, beyond religious reasons (ie, are there reasons regarding cleanliness, health, or moral rights of animals accounted for in these laws?). Is there any more wisdom to following these dietary practices than following any others (eg veganism, vegetarianism)

This question is out of pure curiosity, and I am not trying to offend anyone by asking this, please let me know if the question is too personal or rude.

Thank you in advance! :)