I do hope this little girl is found. This breaks my heart.
If she's anything like a whippet, tell people if they see her, to shake a scarf, hat anything along the ground, like a rabbit or rat. The instinct will kick to "hunt-kill" the moving target. THEN to grab her from behind while she is focused on the "prey". This will also work if she is cornered...toss a hat along the ground or even into the air, she will grab that and not your hand as you try to retrieve her.
Nancy L. Fagin
Greater Chicago Whippet Club