Macfarlane said he had no idea that fans had such deep connection to the character, reported Contactmusic.
In an episode aired in November, Brian was shown killed. But the crucial twist left the series fans angry. They demanded the resurrection of the character.
"We were all very surprised - in a good way - that people still cared about about that character to be that angry. It didn't occur to us. We thought it would maybe create a little bit of a stir, but the rage was not something we counted on.
Responding to a query if he would repeat a similar stunt, he said, "Would I do it again? No, we already did it!"
The series revolves around the Griffins family that included parents Peter and Lois, their children Meg, Chris, and Stewie, and their pet dog Brian.