Dog vitamins fit this picture too.

For all the reasons you take vitamins, your dog needs them too. Liquid dog vitamins from http://www.UltimateHealthForDogs.com are easy to use. Simply put on your dog's food. Much the same way you would take your vitamins... with food.

in reference to:

"Americans love vitamins."
- Patient Money - When Buying Vitamins, Know What’s Worth Paying For - NYTimes.com (view on Google Sidewiki)