Not exactly a large target market, is it? That's the first thing that comes to mind. I'm not even sure that if you were to fix the design/content errors that you'd generate a lot of sales.
Seriously, does anyone actually buy this stuff offline? I'm sorry, but I grew up in farm country...if I want a rooster feather, I'll go back to my hometown and get one for free.
First problem: the code of the layout. This is a layout that could quite easily be done without tables. This would help reduce your code (thereby loading faster for users). Get yo' azz to steppin' on some tableless code!
Next problem: Conditions of use. "Put here your conditions of use information." Does that mean I get to make my conditions of use up?
Next: your home page links. Point them to
http://www.continentalfeathers.com , not index.php (not typed here to avoid any duplicate content issues on your part.)
301 index.php to
http://www.continentalfeathers.com , in case it has any backlinks or accidentally gets some in the future. This avoids the issue above. Do the same thing with
http://continentalfeathers.com , to avoid any potential canonical issues.
Your title and meta description tags are identical in a lot of spots. You should have a unique title and description for each page, and it should be something a user would be able to read and easily determine what the page itself is about.
This is especially important for the title page: what happens when a user bookmarks it? The title tag should reflect what they should see when they see the bookmark.
Contact Us: Where's the address? I wouldn't buy anything from anyone without a physical address, just in case I needed to return it.
Returns policy: you don't have one. You have a shipping policy, but not a returns policy.
The "Affiliates" page. Besides not matching the look and feel of the rest of the site, it looks like a whole bunch of reciprocal links with a cheap SEO trick at the top of the page. This won't do you any good whatsoever. This is just a low-grade trick. Get rid of the page, and to heck with anyone who links to you as the result of it. Your site should generate natural organic links because it's a useful place to buy bird feathers or because it gives out some useful information, not because some idiot wants to raise his PR because links are the universal SEO solvent.
The XML sitemap: you don't need to link to it on your site. You can just submit it to big G and it'll crawl it fine, just fine.
And now the big one...you're using osCommerce, which has to be the single biggest bane in terms of e-commerce on the Internet. Just develop a skin, load some products in and away you go, right?
WRONG.
You need to ensure that your site has crawler-friendly URLs. The silly osCsid session hashes (which do absolutely NOTHING that session variables don't do) need to go. Fix this problem. Fix it now. Fix it right now. In fact, fix it five minutes ago. The sooner, the better.
In other words, the reason your site is failing is because you have too many reasons for it to fail. Sorry if I came off harsh...I'd rather give someone a straight answer than sugar-coat it. I think it looks okay (although I'm not convinced white on brown is the right colour scheme personally, that's aesthetic and I don't judge on that), but there are too many logic flaws in the design.