I have a Doxie...the nose distortion wont be an issue. (I'd be concerned if I had say a Pug, or a Pekingese...)Sigma 16mm 1.4 on an A6400. There is a bit of distortion here with his nose.....but I thought it was for good effect. It's a fabulous lens for apsc.
.This is Nellie, my sisters 80kg American Bulldog Cross. Big daft old lump she is. My sister asked me to take some shots for her last week.