Reports say that Sharmila had to undergo plastic surgery on her face and she got 65 stitches on her cheeks, at the nearby Hinduja hospital.
The incident happened on Tuesday, Aug 18, around 12 noon.
Raj Thackeray owns two dogs: James and Bond.
Meanwhile, Twitterati wished her a speedy recovery. Here are some tweets:
Raj Thackeray's wife Sharmila was badly injured after one of their dog bites her face
Raj Thackeray's wife Sharmila was badly injured after one of their dog bites her face— Omi.D (@omidemp) August 19, 2015