Sheriff Bob Alford says the boy was severely hurt in Thursday's attack and was transported to a Fort Worth hospital. The woman was also taken to a hospital. Investigators on Friday declined to release names of the victims or further details on their injuries.
Authorities say the woman and the boy managed to get into her house before rescue personnel arrived. Alford says arriving deputies also were attacked by the dogs, who lived at the woman's residence, and killed one of the animals.
Mansfield is about 15 miles southeast of Fort Worth.