For Dental+ the initial doubling of the standard feeding quantities is not necessary. As Zest & Pep Joint+ supplements are designed to give lifelong joint support doubling the recommended feeding quantities for thefirst 4 weeks is not necessary. This is recommended when introducing a joint supplement to dogs which are showing signs of joint stiffness and discomfort, to boost the quantities of these nutrients initially to allow benefits to be realised more quickly. If the supplements have been provided throughout the three lifestages this boost is not necessary as the beneficial nutrients are already present to provide the joint support to your dog. If you are starting the joint supplement and your dog isshowing signs of joint stiffness or discomfort, then doubling the daily amount of the tablets for the first 4 to 6 weeks helps for the benefits to be presentmore quickly.