You must follow the instructions on the bottle. First of all realize that there is poison in those shampoos and they are harmful to humans.
10 minutes is the maximum time alotted for the lice...
it gives back nutrients that your hair loses when you wash it, that's why after conditioning its so soft as opposed to hard (to get your hand through) when you just use shampoo.
Absolutely not! Using human hair products on a dog can cause extreme irritation, discomfort, and even harmful medical problems. You should always use only products made for dogs.