The fountain is elevated to provide a better drinking position-ideal for large breeds, older dogs or dogs with arthritis, muscle and joint problems. Encouraging your pet to drink more water helps ensure proper kidney function. Key Features : Elevated Design for a better drinking position. Triple Action Filtration: softens tap water, collect debris, helps absorb odors (filter included, replacement filters available sold separately) Re-circulating Flow eliminates stale, stagnant water Large Surface Area for Greater Oxygenation BPA-Free Also suitable for cats