Missing Gray-Brown Dog in Chicago - Help!

She like a grayish color mix with brown,color does change . I Had Got An Alert Of Her Missing Thru Petwatch contact the dr. And they told me she would be transported to 26 western,contacted 26 western they never received her ,so I have no clue who has her the dr office won’t give me any information on the people that brought her in from finding her so I guess them people still has her .