Late Again, Half Moon?

Alright, so first I'd like to point out things you did well on the piece.

<img src="e.deviantart.net/emoticons/p/p…" width="11" height="10" alt="" data-embed-type="emoticon" data-embed-id="178" title="Point Right"/> The placement of the lighting/shading is great.

<img src="e.deviantart.net/emoticons/p/p…" width="11" height="10" alt="" data-embed-type="emoticon" data-embed-id="178" title="Point Right"/> The background lacks detail, but the overall idea is nice.

<img src="e.deviantart.net/emoticons/p/p…" width="11" height="10" alt="" data-embed-type="emoticon" data-embed-id="178" title="Point Right"/> Jayfeather's markings are nicely done.

<img src="e.deviantart.net/emoticons/p/p…" width="11" height="10" alt="" data-embed-type="emoticon" data-embed-id="178" title="Point Right"/> The pose/idea/concept of the picture is neat and original.

Those are things I found good in your picture. <img src="e.deviantart.net/emoticons/t/t…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="262" title="Thumbs Up"/> Now, this part will seem lengthy, but I'm not trying to point out any "flaws", I'm just gonna tell you some things to help you improve. <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="334" title="Nod"/>

First I'll start with anatomy. You're on the right track. However, there are some things that are a bit off. The thing that I notice first is the nose. Cats have more smaller noses, and I think that's what makes Half Moon look a bit canine like. The entire muzzle itself could be a bit smaller, especially on Jayfeather.
Now something I've never really understood, the way some people do the chest on cats. There's just a big fluffy fluff as Half Moon's chest. It covers up her shoulders. Which doesn't usually happen, her legs are a bit too thick and stocky too.
[link] <--- Take a look at this picture, and compare it to Half Moon. Pay very close attention to the picture, it's easy to get lost in your own 'view' of the cat. Trust me, I've been there! Forget EVERYTHING you know about cat anatomy and focus on picture references. Even trace them if you want, just to get the hang of it.
Here is a tutorial I would GREATLY recommend to you for the anatomy of cats. <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="334" title="Nod"/> ---> [link]
Just sit down, grab a sketch book or some paper, or even use your computer, WHATEVER, look up a TON of pictures of cats (good site for cat reffs--> [link] ) and just sit there and sketch! Practice! Remember to be loose with your drawings, don't be stiff! Get as messy as possible just trying to get things right. And if you're feeling it, post a big sketch dump of all your practice here on DA sometimes, to show your progress!
I'm by no means saying this will make you PRO overnight, but if you keep at it consistently and work hard (and not afraid of trying new things!) then you are GUARENTEED improvement. <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="334" title="Nod"/>

As for shading and lighting, don't forget reflective light! Realistically there'd be a little bit of light on the left side of Jayfeather, because light bounces. There should be a little on his muzzle as well to create depth.

I also notice your drawing is a bit rough and for lack of a better word, sloppy. Don't worry, there's an easy solution!
I make my canvases at 5000px by 5000px. Sounds big, eh? The bigger it is, the more neatness and details there are.
BUT YOU HAVE TO ZOOM IN! Zoom in a LOT when working on your picture and place close attention to detail. That way, when you re-size it to upload, viola, details!
This is more time consuming, but time is good! The more time, the more quality. <img src="e.deviantart.net/emoticons/t/t…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="262" title="Thumbs Up"/>

Now, I think that's about all I need to say.
I'll leave you with one last tutorial for eye coloring --> [link]
It's obviously not realistic (I should probably make my own tutorials lol) but it's simple and a great way to start developing your own way of coloring a cat eye. (It's what I started with!)

I hope you found everything here helpful, just keep practicing and working hard and I guarantee you'll be improving. <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="334" title="Nod"/> Just don't push yourself, or be too hard on yourself! The downfall of being an artist is this: There's always going to be someone better. But that just gives us all the drive to be better! <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>