Dog Friendship Bracelet and Silver Etching Observations

My son's German shepherd, Bishop, has the best buddy, a Norwegian elkhound, Dell. Dell's owner is a friend and I thought I would make a dog friendship bracelet for her. I etched silhouettes of the two dogs and a few paw prints in sterling silver and mounted the silver pieces on braided leather. When I was etching the dogs, I used two different solutions of ferric nitrate; one was older, the other one freshly made. The effect on the etched surface is very noticeable, although completely unintentional: the German shepherd was etched using the old solution; the Norwegian elkhound, using the new solution. Shown next to the etched pieces is the finished bracelet.