This is ours (though with our initials and date)! We found it on Etsy, and I've seen a few shops on there that have customizable toppers that include being able to add pretty much as many animals as you want.
I couldn't find anything that included my dog soooo I ordered a custom made figurine. It's still not finished so no pictures yet but the designer is recreating our outfits for the wedding based off pictures and including our dog. Now let me do say, they are expensive, but if you're willing to drop the money for it I think it's worth it as it can be kept as a memoir! @lucysclaydesigns is her IG in case you want to check it out!
I actually just went a porcelain figurine from Amazon. Felt so elegant and I just about died when I was looking at a cake vendor in town have an example cake online with the same topper! I knew it was a match made in heaven haha