The first shot is low contrast, the frame and surround almost a shade of grey. Was that your intention ? I think there is a fine balance to be had as regards having a bright white surround and the main image. Bright and dazzling isn't always so great, so I, like you, sometimes tone down the surround to soften it.
But as customers would be viewing for purchase, it's important to show what they will receive. So, maybe there could be a little more contrast to the first item. Look at the original and work out whether your image of it really reflects the tonal balance, or not.
The image can become a lot more 'punchy' with improved 'levels' and contrast tweaked in software. That makes the design and text stand out more.
Not sure if you take your pictures using natural daylight or have considered diffused electronic flash. You can get softboxes for flashguns which give nice, diffused lighting, but may need to experiment. I use a sort of 'ringflash' sometimes, and can get shadowless lighting with care. But you don't have to go down that route, and big white card reflectors can be useful too.
The second image relies on the background to show off the tree silhouette.
Again, I would tend to bring up the levels and contrast a bit. On software like Photoshop elements and others you can see a simple graph of the tonal balance as you change settings, which helps. In my view, there needs to be more contrast between the frame and tree and the background. That would bring out the tree and frame more.
In essence that would make the black appear blacker, and the background a little lighter. I like the out of focus background, which works well.
You could do a second shot also of a bit of a close-up of the dog and bottom text assuming the detail is there.