Feed them? No question! The question is rather how you can resist to take them home- something I often felt when I was in places where some poor kitties cam begging to your table.
I remember Greek cats who even wanted to eat bread from your table. We bought cat food for them.
I remember a Balinese kitty who from us got his first cat food. The people from the hotel who loved the kitty (it was a boy named Susie ) looked at him gobbling the kibbles down and saying. "Very like!!!"