Yes, protein can help them after (or during) molting. Besides the regular layer feed, a little cat food, extra bits of meat or fish scraps, a small amount of calf manna, a handful of black oil sunflower seeds, some nutritional yeast, a slice of tofu, some cooked lentils or split peas, a scoop of live mealworms...whatever you have on hand that can pack a little protein punch. You don't have to overdo it, but a hen won't lay an egg, unless she HAS an egg inside her to lay. At this time of year and especially after a molt, her egg-laying mechanism sometimes needs a nutritional boost.