I finally got around to trying Kathy's dog treat recipe today (being iced-in helped). As she says, it's extremely forgiving. I couldn't find ground flax seed, so I bought whole seeds and coarsely ground them in my food processor. The result was a pretty, flecked dough that--despite the stickiness of the peanut butter and molasses--was very nice to work with.
Moe and Porter approved of the result, and with about 4 dozen cookies (I doubled the recipe) chances are some other dogs will be enjoying them soon too!