The fate of two bullmastiffs that killed another dog and attacked a woman Saturday afternoon will be decided in roughly 10 days.

The owner of two bullmastiffs has surrendered the dogs to the City of Calgary. (CBC)

The large dogs were on leash when they crossed paths with a woman walking her schaunzner-type dog, which was also on a leash. One of the mastiffs slipped loose and went after the smaller dog.

The other mastiff got involved when the owner tried to stop the altercation. That's when a woman passing by was bitten on her arm and cheek when she tried to help.

Animal and Bylaw Services spokesperson Andrew Bissett says a decision about putting the dogs down will be made after a behavioural assessment following the quarantine period.

Ownership of the dogs has been turned over to the City of Calgary.

"I won't want to judge ... before we do our behaviour assessment," said Bissett.

"That is why we do that with the animals to see what can occur, but what I can say is because they have been surrendered to the city, they will not be going back to the dog owners."

The former owner now faces six charges, which each carry a maximum penalty of $10,000.