What is the relationship between Spillers and food in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Spillers wanted to be completely confident there were no adverse side effects for the canines, before the new products were sent out out into the market in a highly-competitive pet food industry.

Answer: industry