Re: Hive issue
So let's start at the beginning. You have a survivor hive after a rough winter. The season has started slow....so has the colony. You're worried about the lack of brood but there apparently isn't a lot of food coming in. I suspect you have no drones at this point. If you do, very few. The colony is still in late winter mode. Actually, you should should be grateful for a queen that refuses to expose the colony to collapse while an increase in population cannot be sustained. So, let's not compare packages (usually from a warm and abundant area of the country) to your colony. As mentioned, a frame of green brood wouldn't hurt. Emerging brood will add to the population and help stabilize a shrinking work force. You can feed syrup to stimulate wax production but without the need for cells and without young bees, you're not going to get too far. It won't hurt to feed but don't think it will be the total solution. Feeding pollen (or, if you have to...pollen substituite), might help along with syrup. With that you're simulating a fuller spring season and the colony may well respond until the real stuff comes out. If you start, don't stop until nature takes her rightful place. You mentioned that they're in a five frame nuc. Not a bad idea but keep an eye on pollen coming in and your brood frames. Bee's that start late often start quick (carniolan's are a good example). You can go from sweating it out to a swarm real quick. Finally, I suppose that you could hive your packages and then swap locations for a bit to increase the population of your colony but as long as you think you have a good queen, you can just wait it out and let nature do her thing.
"My wife always wanted girls. Just not thousands and thousands of them......"