When I bought my seeds at a local Feed & Seed store, I found a "Hunting Dog's First Aid Kit" and bought it.
I think I am going to put together a doggie Bug Out Bag very soon. I like the looks of the kind of doggie BoB's that the dog carries. It's a saddle bags kind of pack animal system.
If your dog will carry the bags, they sound like a fine idea. You better try them out and engage in some training, before you count on them.