Cats, for me, can prove to be particularly difficult to paint, especially as a 'daily painting' (when I am seeking to complete the work in one sitting). About half of every 'daily' cat painting I begin turns into a wiper. I know this fail rate would reduce if I worked over several days in layers, instead of alla prima. But that isn't the point: if I do that, it would not be the process I am seeking to gain proficiency in - it would be a different process. The results would look different, too.
This Maine Coon was my 3rd attempt. I think he turned out alright.