 Just place the recommended number of drops on a biscuit or in their water and keep them inside in a dark, quiet, den-like environment. And as I mentioned, now through Monday, all 12 Zamzos have extended the sale on our homeopathic drops for dogs and cats. We even have licky mats on sale that release endorphins and natural bully sticks to give your dog something to chew on that lasts for hours. So even if the actual 4th of July is over, the fireworks and celebration continue through the weekend.