Hi Pixie,
Your shop looks sweet and your photos are pretty good. Personally, I would go for a more neutral background, either white or light grey. The pink is cute, but if you want to get into treasuries, the background needs to be consistent with the other photos in the group. It might be nice to use some models as well. I started with pink in my shop too...I thought it would brighten things up because all my animals are grey or brown!
It has taken me 20 months to get to almost 500 sales. Last October, I was sitting at around 150. So, it took about a year to really get things rolling. Teams are great for getting tips and getting known. I am on a team that has a facebook page, tumblr, twitter and a blog. I also have a facebook business page of my own that I post on about once a week.
I renew 3 items daily. Other than that I don't advertise, blog or tweet. I think if you want to sell very high volume, you have to do all these things.