If I'm a cat then you're a scratching post.

Well, other than supporting and maintaining the complex ecosystem upon which all life, especially human, is dependent. Food chain is more than just a pretty tree diagram ...

what are some other uses animals serve besides food chain

^ Ermm lemme guess, keeping the fragile ecosystem bla bla, as posted by Fal.

Worms churn the soil, keeping it fertile so that trees can grow. Ants cut back on overgrown rainforests to enable a balance of plants to grow and to make sure no singular aspect becomes over populated. Flies help to break down feces into compost.

Spiders control insect populations

Goats eat Kudzu (spelling?)

Elephants knock down dying trees and crush their trunks

This whole debate is upside down.
Humans are the cancer of the earth...it's true.

I think you're retarded. I don't hunt, but it's not fair of you to tell somebody their actions are wrong when they're trying to survive, or put food on the table for their family. If you don't agree, don't partake, but do'nt bitch about how they lead their lives.

^ That wasn't very nice sir.

It may not've been, but it's a rather unbridled version of how I feel about the subject. He asked for opinions, he got them.