Cats tend to have a lot of plaque on their teeth or bad breath and the mineralisation of teeth plaque due to a build up of calcium from the saliva can lead to dental calculus formation in the long term bacteria can cause gum infections bad breath and loss of teeth daily brushing is the ideal way to care for your cats teeth dry cat food that encourages your cat to chew more boosts the mechanical brushing effect helping to effectively reduce plaque and tartar royal canin oral care cat food