Thanks for sharing it Lisa. It really helps us help you better.
Just took a REALLY quick peek. My 1st impressions.
LOVE the site, LOVE the logo.
Great job!!! 5 thumbs up. 
Now aren't you glad you posted it?
It also helps to see you are linking to a variety of merchants. That helps eliminate one of the questions in my mind, which was "does she just have one or 2 merchants that arent converting or tracking well/"
After just a quick look, the one thing I can suggest, but am not sure it's doable is to change the product link structure. I assume you are using datafeeds??? If so it may not be too hard.
NOW bear in mind if you really feel you have plenty of traffic and only need help with conversions - this will mainly help you get more traffic - it may not help conversions and COULD hurt conversions. BUT it could also help conversions. However in general increased traffic means more sales.
Let me make up an example to explain my thought process.
People who search for more specific terms tend to be further in the buy cycle.
Plus specific terms are easier to rank for than general terms.
So someone looking for "Rhinestone Dog Collar" (4,512 searches a month) may know exactly what they want and be ready to buy one. You could also get ranked more easily for this term. Someone just searching for dog accessories or even dog collars may be more lookie-loos and those terms are harder to rank for.
So using the example "Rhinestone Dog Collar" - you may not show up in the top 30 at all now. To get to the product I"m looking at, if someone just got to your homepage with one of your main search terms like "dog accessories", they would need to navigate to >> dog collars >> couture collars -
then the product I picked as an example is down about on the eight row.
So I may not even see it.
The more important thing is having all those collars on one page, none of the keywords will get ranked that highly.
The most important thing is since you link directly to merchant, with only a product title buried on the page, you miss out on all the juicy content and spider food in the description that may pull ready to buy prospects in your door.
If you linked to the description on your own site then you would have a page optimized for "Rhinestone Dog Collars" with all this spiderfood.
"Gorgeous "Diamond Quality" European Rhinestones mounted on a Beautiful Rich Roccoco Ribbon. Backed with Nylon for strength and durability. Silver accents and d-ring. Isn't this a beautiful collar for the price? Love the rhinestones galore."
There are only 1,430 competing pages for allintitle: "Rhinestone Dog Collar".
There are 97,400 competing for for allintitle: "dog collars". So you'd have much better chance getting up in the top in front of buyers looking for exactly that product.
Multiply that strategy times the hundreds of products you have on your site. If each product linked to description on your site, you have hundreds of targeted sales pages filled with spiderfood to attract more targeted buyers and you take them directly to the page that fgives then what they want instead of a cateory page filled with other products.
The downside is you are putting extra click in the mix, for people that don't come from search engines direct to a product page, put just search on your category pages, however I think the upsides COULD outweigh that. Not positive and only a suggestion and something to consider.
Depending on the script you are using and if you are using datafeeds it may not take too much work to make the change. If you arent using a feed or this would be too much work, then just do some keyword research to and pick a few in-demand products that don't have high competition and just do a few individual pages to test conversions on those products.