Rabia is among four people, who have suffered splinter injuries in the shelling this morning and have been brought to the government medical college in Jammu for treatment.
The four continue to writhe in pain, but Rabia's condition was "very grave", doctors at the hospital say.
"We will have to operate on the little girl to save her life. She suffered multiple internal injuries," a doctor told PTI.
Rabia was airlifted to Jammu with Mohammad Rafiq, 25, from Poonch. Two others - Mohammad Sadiq and Nazir Hussain
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Rabia's uncle Mushtaq Hussain, a resident of Bannat village near the LoC, said her elder sister Yasmeena, 15, died and her mother and another sister were injured after a mortar shell fired by Pakistani forces pierced through the wall of their house and exploded near them.
Mohammad Sadiq, Rabia's father, escaped the shelling as he was not present in the house. He said Yasmeena suffered the major brunt of the shelling by Pakistan and died on the spot.
"(Rabia's) condition is also not well as the doctors said the chances of her survival were bleak. They are doing their best and we are praying for her life," he said.
Pakistani security forces have been frequently violating the ceasefire agreement with India. The latest violation happened along the LoC in Dighwar, Shahpur, Qasba, Kerni and Mandhar sectors was reported around 6.30 am and continued till 11.30 am, officials said.
This year, particularly, has seen a sharp increase in ceasefire violations by Pakistan. Till August 1, there were 285 violations by Pakistani forces compared to 2016, when the number was significantly lower at 228, according to the Indian Army.
"I felt that my legs were amputated due to the impact. When I regained consciousness I saw blood oozing out of my thighs. My nephew Asrar Ahmad was lying dead nearby," he said.
Rafiq's brother Mohammad Riyaz said there had been no warning by the Army about the mortar shells by the Army.
He said it took him two hours to pull his brother out of the house and then trekked two kilometres to reach the place where police officials were waiting for them.
Riyaz demanded that underground bunkers be constructed in his village. "At least we can save our lives by taking shelter there."
Sharma, who claims to be a Bajrang Dal activist and goes by his first name only, demanded that free treatment be given to the victims of border shelling at hospitals.
Muneer Hussain, who was accompanying two of his nephews, said they were returning to their village with their herd of sheep when the shelling started, killing at least three dozen animals.
Slamming Pakistan for targeting civilian areas without provocation, he said his nephews were injured in chests and arms in the shelling.