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.
Many kitten owners believe that how long till kittens open their eyes sets the standard for everything else, including how long until the kittens can be adopted. Most kittens can leave their mother as early as eight weeks, however it is much healthier for them if they stay until about twelve weeks.