Preheat oven to 300 degrees.
In a small bowl, combine chia seeds with water and let stand for about 30 seconds.
Combine flour, chia/water mixture, and oil in the bowl of a stand mixer.
With the stand mixer running on low, slowly pour in the broth, adding just enough so that mixture comes together as a dough. It may take a little less than the 1.5 cups, so keep an eye on it.
Roll the dough out on a lightly-floured surface and cut out the shapes with cookies cutters of your choice. No need to chill the dough before rolling!
Bake the treats on parchment-lined baking sheets for about 30 minutes or until they're firm.
Be sure to let them cool completely before feeding them to you dog!