FIRST ON FOX: The family dogs who mauled two Tennessee toddlers to death Wednesday and left their mother with severe injuries had never been aggressive, a friend told Fox News Digital.

Kirstie Jane Bennard, 30, was seriously wounded when she tried to pull the family's two pit bulls off 5-month-old Hollace Dean and 2-year-old Lilly Jane at their home in rural Shelby County outside Memphis.

"That attack lasted longer than any one of us could have ever imagined," the devastated mom's best friend, Kelsey Canfield, told Fox News Digital

"I can promise you those children were her world, and if there was any inkling of danger, she would have never had those dogs near her kids," the shattered mom's best friend, Kelsey Canfield, told Fox News Digital. "Those children were everything to them, and they just have a really long journey ahead."

The family had the pets, Cheech and Mia, for more than eight years without a violent incident, Canfield said.

TENNESSEE TODDLER, INFANT KILLED BY FAMILY DOGS, MOTHER IN CRITICAL CONDITION: SHERIFF

Bennard family in a group portrait

Kirstie Jane and Colby Bennard with their 5-month-old son Hollace and 2-year-old daughter Lilly. The children were mauled to death by the family pit bulls. (Facebook)

"That attack lasted longer than any one of us could have ever imagined," she added. 

PHILADELPHIA MAN IN CRITICAL CONDITION AFTER BEING ATTACKED BY HIS OWN DOG

Canfield was with Kirstie Jane Bennard's sister Friday, and they were headed to Regional One Health in Memphis to visit her. Her condition was upgraded from critical to stable.

"She was initially confused. She's awake now, and she's aware [of what happened]," Canfield said.

Hollace and his big sister Lilly Bennard stare at the camera in a group portrait

Hollace and Lilly Bennard were mauled to death by the family's pit bulls in Tennessee on Wednesday. (Facebook)

The children's father, Colby Bennard, who works as a parts manager at Bumpus Harley-Davidson, wasn't home at the time of the attack. 

The father had shared photos of Cheech and Mia on Facebook, calling them "house lions."

Colby Bennard's uncle, Jeff Gibson, wrote on Facebook that Kirstie Jane Bennard has an "uncountable amount of stitches and bite marks over her entire body including her face." 

A black and white and brown and white pit bull side by side

The Bennard family dogs, Cheech and Mia, who were euthanized after killing 5-month-old Hollace and his big sister, Lilly, 2.  (Facebook)

Her legs and arms are completely wrapped in bandages, but she likely won't have permanent damage "other than a heart that will never heal," the post says.

 "[Kirstie] is a f---ing hero! This attack lasted over 10 minutes, and she never gave up trying to save these babies," Gibson wrote. 

DALLAS 4-YEAR-OLD GIRL REPORTEDLY DIES FROM A MULTIPLE-DOG ATTACK

Authorities did not say why the family pets viciously turned on the couple's only children.

 The Shelby County Sheriff's Office, which is investigating the tragic killings, said the pit bulls were euthanized on Thursday.

The Bennard family

Kirstie Jane and Colby Bennard with their daughter Lilly, 2, and 5-month-old son. The children were mauled to death Wednesday by the family pit bulls Mia and Cheech. (Facebook)

Police and the fire department responded Wednesday at 3:30 p.m. to the two-story home near Shelby Forrest State Park, and the children were pronounced dead at the scene.

"They were perfect, they were beautiful," Canfield said of the infant and toddler, adding that they "worshiped each other." 

Kirstie Jane Bennard's sister, who did not provide her name, asked for privacy while the family grieves. "It was not just a loss to my sister but to me as well," she said, weeping. "That was my niece and nephew."

Lilly Bennard, 2, looking at baby brother, Hollace sucking pacifier

Five-month-old Hollace Bennard and his big sister, 2-year-old Lilly. The children were killed Wednesday by the family's pet pit bulls. (Facebook)

The community is reeling from the horrific attack. 

"To say that I am at a loss for words and my heart is and has been breaking since I found out is an understatement," wrote friend Stephanie Chipman on Facebook above a series of photos of Kirstie Jane Bennard and her family. 

"Just in absolute shock. Praying so so so hard for the good Lord to hold you and your family tight and help you make your way through this. Here for you always and love you so much!" the post continued.

Kirstie Jane Bennard poses with friend

Kirstie Jane Bennard, left, poses with a friend in an undated photo. Her two children died Wednesday after they were mauled to death by the family dogs. (Facebook)

The children's autopsies are still pending.

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At least 33 people in the U.S. were mauled to death in 2020 by pit bulls — more than any other dog breed, according to non-profit dogsbite.org.