I moved to St.Henri, on Walker street July 1st, and he got out. He does go outside, but this was a new neighbourhood. He is silver/grey with lion type fur around his face, and a feather tail.
He also has a collar with his name and my phone number. Male, neutered, 6 years old. I last saw him around 7 am on the morning of July 2nd in the park right beside my new apartment.