Hi Sabrina. I see in your store that you are selling other things than just your dog treats. Is that why you want a new name?
It’s hard to say whether or not sales will be significantly impacted by a name change. If you have a good reputation established on your current name, and have good repeat business, changing a name could potentially cause some loss, i would surmise. However, if those factors arent in play, likely a name change wont hurt.
Here is the link detailing how to change your store name. Good luck to you.
https://pages.ebay.com/help/sell/questions/store-change-name.html
