At three months old, my Pomeranian puppies were stolen. One was a boy, one was a girl. Now, i think i found the boy puppy. He looks exactly like his father, and has the coat color of the mother (who i have). I took the puppy (he would now be 7 months) home to my dog (the mother) and she sniffed him, then started licking his snout. I took him a bath (he was dirty) and my dog kept whining and barking from the door. This is strange because my dog normally barks and growls at other dogs.

Also, when the boy puppy was born, he had a big gash on his stomach from where the mother accidentally bit into him (opening the sac) . He has a little red itchy splotch where he keeps biting at. There is also a patch of shiny skin , like a scar, with what i can only describe to be a mole (looks like it, but skin colored) on the skin of the scar. Is this anyway to tell if it's my puppy?

I cannot afford to go to vet for a test.
Thank you!

That sounds like it is her puppy. Either way, she seem's accepting of him and you should keep him. When you have the money for a vet visit they can check his teeth and give you an age estimate, maybe that will help you decide if it's your dog's puppy.

The only way to tell is to have DNA run on the dam, sire & puppy - period