How many dogs is one household allowed to have in NSW?

I already have two gorgeous puppies. But my friend rescued a puppy from some kids who were about to drown her last night and I REALLY WANT TO TAKE HER!!!!!

She is the most gorgous little thing and in much need of a loving home.

I don't want to put my hand up until I know if it's ok for us to have 3 dogs though!!

HELP!