One thing I'll add...
We have eight buns...and with each and every one of them (except for Teeny the Flemish Giant AKA Piggy Boy), it took them about a week after being here to feel comfortable enough to eat their pellet food. So, that meant they weren't really eating any for the first week (about the time you've had him, so makes sense to me that he's eating now).
The drinking might have been a bottle issue, or could've been that he didn't get enough while he was at the pet store, so he was busy restoring the correct hydration balance to his system (another thing my buns have always done their first week, especially the rescue buns).
As far as the pellet food, and what's good, I recommend you check out the
Feeding Your Rabbit thread in the
Bunny 101 section of the
Lagomorph Library here. I also recommend you check out these other two threads:
Pellets
Hay: All About It
And a good place to check the percentages of your pellet food content is
this article on Commercial Pellets. When I joined the forum back in Feb of 06, Naturestee recommend the site, and I've been using it as a reference ever since.
Another great suggestion: Check out online and see if you can find a Tack & Feed place near you that carries bales of hay (we get 120lbs for $20, so it's a good deal) and might possibly order a good quality food for you. For example, our favorite feed place orders Oxbow Bunny Basics T (which is one of the best out there), and we just pay the cost of the food...not the shipping. We pay about $1 a lb for the food, which is about half what it would cost to order it online. Also, check out the
Oxbow site to see if it's sold in any pet stores near you.
About how much food to give him...the usual advice is if he's still growing (which is usually under nine months of age), he'll need an alfalfa-based pellet food, and that'll be free fed until he's done growing (which varies by breed...smaller breeds finish growing earlier than other breeds). And then after that growth period, he'll need a Timothy-based food, and start to get his food amount cut down gradually to a daily amount of 1/4c per 5lbs (though that also varies per bun...some buns need more, some need less...also depends a bit on activity level).
I know, this is a lot of information...and sometimes it's a bit overwhelming...but just take things one at a time.
Hugs to you!
Rosie*