They truly pups?
I doubt the female is, having sagging teets, she either has or had a litter of pups.
Feed them something better then a 'diet' food.
I say keepem at your art studio, if they get plenty of socilization, and training, they can be great dogs.. just like any dog.
Takem to the vets aswell, if their chipped, might be able to find their owner..
Pick up some Science Diet A/D while your there if the dogs are starving, it looks like **** but it's a high nutrient diet.