buffalo doodle

Here is a paint study, a doodle. It's a buffalo. Is it seems like one?
I'm trying techniques in this one, making some brushes and trying to simulate oil paint - i still have made no progress.
It's visible the difference between the head and the body, each one was made with different brushes (the head is better until now).

Tell me what you think about.

(By the way, it's a great way to pass lunch time at work, that and read, but I'm lazy, so, I draw.)

[Work in progress]