1. Pet Food Institute Pet Food Sales http://www.petfoodinstitute.org/?page=PetFoodSales
2. Pet Food Industry Petfood Top 10: Riding out the storm http://www.petfoodindustry.com/Petfood_top_10__Riding_out_the_storm.html
3. Pet Food Institute Pet Food Sales http://www.petfoodinstitute.org/?page=PetPopulation
4. Euromonitor International Pet care in France http://www.euromonitor.com/pet-care-in-france/report
5. Do pets influence the quantity and choice of food offered to them by their owners: Lessons from other animals and the pre-verbal human infant;Day;CAB Reviews: Perspect Agric Vet Sci Nutr Nat Resour,2009