The most common cause of this is the tartar buildup on its teeth or gum disease caused by untreated tartar.
Techniques dog and cat collars and leashes. So within in 1997, I got curious and started this specific deeper see into fluoride. In case the damage as well severe, and also quality . https://Embargo.energy/index.php/Brighter_Whiter_Teeth_The_Actual_Yellow