For the chest I baked two cakes in the Wilton ball pan and for the tummy I baked a cake in a Pyrex bowl. I put a flower nail in the bottom of the Pyrex bowl and then poured cake batter up to the top of the nail. Using the flower nail is supposed to help the cake to be done in the middle more quickly. This was the first time that I used a flower nail in a cake and it worked really well. I did quite a bit of reading about how to bake a cake in a bowl and from what I've read lots of people were worried that a Pyrex bowl would shatter if baked unless the bowl is marked oven safe. Well, my bowl did not say "oven safe" but I baked the cake in it anyway and it turned out perfectly. It did take a bit longer than a regular cake to bake, about 40 minutes.
After baking the chest and tummy I baked a large sheet cake. I put the tummy and chest on the sheet cake and carved the shape that I wanted then frosted and covered with mm fondant. Hopefully these little tips will help someone out there who may be trying to make a similar cake.
The bow was supposed to be camouflage so I ended up painting brown and more green onto it. In this picture the chest looks quite lumpy. I'm not sure why, but I do think the bow looks more like camo after it has been painted.