Should we tolerate animals being hurt in the production of art?

Does it matter that many of the animals who were hurt or killed in these productions were unintentional?

Some of these movies were made long ago when standards were different from what we consider ethical today. Is it unethical for us to enjoy watching these films and shows today?

http://www.avclub.com/articles/yes-animals-were-harmed-21-films-and-tv-shows-that,72051/