Hi Melholly,
I'm glad you did post, I'm also on my first weaners, who turned 5 months last month. I'm also feeding them on 1lb per day (split into 2 feeds) and they seem to be growing well.
I went on a course before I got them and was told to buy a special measuring tape that converts their current weight into dead weight (so you can tell more accurately when to send them off). I can't find one anywhere! Now you've posted this, I can see I don't need one - Thanks
Good luck with your first pigs- hope you're enjoying them as much as I am