You catch on fairly quick when it comes to trying something new From what I've seen in your previous horse picture you're really nailing the head and body; shouldn't be too much of a surprise since horse and canine anatomy (as well as some other animals) are similar just different size, placement, etc. if you think about it.

Nice job on the shading too, it really shows the form.
The legs seem a bit short and off but just keep practicing with horse references in different poses, and keep looking at your drawings closer to spot the inaccuracies so certain parts don't get wonky