[Linda Buquet]

Well it's a little hard to guess without knowing more but you want quite a bit of content on home page to get a few of your best keywords on the home page and also to give visitors some idea that you have lots of what they are interested in. Then have a menu with text links that lead to all the different "alphabets" or product areas.

But if you divide the products or alphabet up per page then you can focus your keywords better for searchers and for search engines. So for instance on your D page if it was about dogs you'd have Dalmatians, Daschunds, Dobermans, etc. on one page and can optimize your KW for those breeds.