Cortisol and other hormones release a surge of energy in the form of glucose (sugar), which the body can use to fight or flee. That rush of glucose is no problem if your body's insulin response is working correctly.
Notice that the kittensâ ears are just beginning to unfold, though their eyes remain closed. Their sense of smell, hearing, and taste are slowly starting to develop. Tweed is only three days old. After almost a week, the kittens begin to wiggle around on their own a little bit and their eyes start to open.
Blue Eyes on Kittens. Most adult cats do not have blue eyes, although some do. Nevertheless, cat owners may notice that kittens' eyes are blue at first. Many kittens have blue eyes (although not all kittens do) during the process of eye opening that lasts the first two to three weeks of life. The eyes of a kitten, as they continue to develop, do not inherently have the color pigmentation necessary for her true eye color when she is young.