Sometimes you have a lot of drones because of a drone laying queen. Is there worker brood? Are there large sections of worker sized comb? If you have a queen laying half drones and half workers I'd look for a supercedure cell. The bees almost always replace her if there is worker brood to make a queen from. If half the bees are drones, I'd probably give up on it and combine it with the other nuc for now and when it has built up a bit, requeen it. If there is a fair number of workers but most of the brood is drones, I'd requeen.
If there's just one in ten that is a drone, that's normal.
If there's just one in ten that is a drone, that's normal.