They breed in late fall, around October. After a gestation period of 2 months, 2-4 kits are born in a den. Not much else is recorded about their lifestyle. The grey zorro has been heavily trapped for its fur. More than one million grey zorros were killed in the 1980's for their fur.
Heavy snow kills off many foxes, and they die of starvation.
But their numbers bounce right back. They have an intense competition with the culpeo, which may affect their numbers in areas where their ranges overlap.