A few things I noticed from browsing the site quickly:
1) The site takes a long time to load. I would look at maybe getting a dedicated server or at least an upgrade from what you have now.
2) The main homepage has the largest image being unclickable and not having any information on it. I would add some writing too it, or make it clickable to "top sellers" or "specials"
3) I have to click on two different sub catergories before i see any products. i.e. bedding>bed in a bag>garden of eden>add to cart
It should be 1 click to check out. have it be available to check out right from the homepage, not 4 clicks later.
Overall, I do like the layout though. Good pictures and professional layout.
Best of luck!