Police have recovered a weapon from the scene in Edmonton but would not confirm reports that the knife was a machete.
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The 18-month-old baby girl was in "excruciating pain" after suffering broken ribs, leg fractures and injuries to her spine, face and neck.
The "world's first transgender doll" has appeared at New York's Toy Fair and will go on sale in July.
The exhibition includes the gown she wore when she danced with John Travolta at the White House and a dress used for a Vanity Fair cover.