http://listverse.com/2007/12/28/top-10-dumbest-pet-products/
http://www.dailyrevelry.com/the-15-most-ridiculous-things-people-buy-for-their-pets/
http://weredogpeople.wordpress.com/2012/05/26/top-five-useless-products-for-dogs/
http://www.thisblogrules.com/2011/02/the-ten-most-useless-products-ever.html
http://www.readersdigest.ca/pets/care/best-and-worst-pet-gadgets/?id=2