I bought a pack of Zombie Dogs, long ago. They sat in my painting area, for several (too many!) years. Then one day, I realized that I did not need to paint every single exposed organ a different color… That broke the painter's block, and I was off to the races. I painted up all 100 of them, mounted them, and textured their bases.
In my fantasy campaign world, everyone burns their dead, to prevent them from coming back! What's a poor Necromancer to do?… Breed dogs for your Undead Army. Vile, but so is Necromancy. It's fun to field an army of Zombie Dogs, if you don't think too much about how they were sourced.
They're not terribly effective in the game, but they make a great visual site on the tabletop, and they do create dread in the opponent's army (Undead always trigger a Morale Check when the living units come near them), so they score high as a psychological weapon. If the Necromancer gets lucky, he can Route enemy units which drastically fail their Morale Checks, so they can be very effective, depending upon the die roll, and how they are deployed in battle. Cheers!