Devil is vegetarian because he has horns :-P

I am reading this Eragon book.. at first I liked it but I am not liking the inconsistency of it.

Its all fantasy but still even fiction should have some consistency and fictional world should have fictional biology chemistry and physics right? like for eg hitchhikers guide to galaxy - bable fish - Adam Douglas didnt sleep untill he figured out how all the different people(??? creatures ) understood each other. He was not ready to air the show untill he came up with babel fish... that shows a quality book! ( if u dono what babble fish is - Go read hitch hikers guide! its awesome)

In Eragon, I dont like it that Urgals are non vegetarian and they have horns like a bull...

Saphira the dragon .. behaves like a cat.. she has ears!? reptiles dont have ears... she gets tickeled under her ears...

Eragon does not like to eat meat after being in their minds but he doesnot have any problem with killing enegry by drawing on it from small animals.. His values are not consistent.

am I nitpicking? The world is not very well thought out.. its a mass publication. craft project not art :-( too much money and publicity does this to people.. they want to write somethgn even when they are not motivated..Its not dil se - its a work of the half hearted head.:P