The body of the 29-year-old woman was found Saturday in a forest outside the town of Villers-Cotterets, about 90 kilometres (55 miles) northeast of Paris, the prosecutor's office in nearby Soissons said.
An autopsy showed that she had died of “bleeding after several dog bites to the upper and lower limbs and the head,” prosecutor Frederic Trinh said.
Some of the bites were “post mortem”, he added.
Trinh said that tests had been carried out on 93 dogs, including some hounds from the hunt and five dogs belonging to the women herself, to try establish which ones attacked her.
The police have launched an investigation into manslaughter by dog attack.
According to local newspaper Le Courrier Picard, the dogs were hunting deer.
The woman had called her partner while walking her dog to report the presence of “threatening dogs”, the prosecutor's office said.
It was he who later discovered her body.
Brigitte Bardot, president of her eponymous animal welfare foundation, declared herself deeply shocked on hearing of the case and in a letter urged Elisabeth Borne, French minister for ecological transition, to suspend “immediately all hunt authorisation for this season”.
The Paris-headquartered French hunting association said in a statement, however, that “nothing shows the involvement of hunting hounds in the death of this woman”.
France has more than 30,000 hunt hounds in total and the association stated that “these dogs are trained to hunt a particular animal and obey man in all circumstances”.