The question of whether keeping chickens is ethical has many facets, and there is much disagreement on the topic. The first issue is animal welfare. While industrial animal agriculture may make sense to those who eat animal products, it is not moral to modify the bodies of living creatures, and keeping chickens is no exception. These birds have been altered to produce eggs for humans through unnatural means, and the relationship between the hen and her keepers is tainted by this unnatural modification. In addition, chickens do not have the capacity to speak, so they do not have the ability to consent to a trade of eggs for care or shelter. Therefore, many people consider the relationship to be one of convenience rather than mutual respect.