Dear Moxie, Dear Rex

When a family brings home a second, younger puppy, the two dogs (the older Moxie and the younger Rex) begin exchanging letters that, on the surface, appear kind. However, a closer look reveals their true feelings. One thing is clear, Moxie is determined to get rid of the younger Rex. Will Moxie’s letters rid her of this nuisance, or will the appearance of a cat finally unite them?