No on opening eyes! That happens at 2 weeks old. They need to be 4-5 weeks. I start giving them cheerios and small treats around 3 weeks old. They will start chewing on them. At 4-5 you will start seeing them drink our of the water bottles and hang upside down on the hardware cloth to get to feed. This is usually the best time to wean. I put them straight into my feeder/holdback/growout tubs at this point.
Regards,
B