Fish oil supplementation may be helpful for pets with inflammatory diseases including allergies, arthritis, kidney disease and heart disease and has been shown to slow the growth of cancer, according to a recent article from www.examiner.com .

However, the article claimed eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are omega 3 fatty acids found in fish oil, are too fragile to survive the shelf life of commercial petfood.

The only reliable source of EPA and DHA is salmon oil in capsules, according to the article.