Advise on a show heifer needed

I have a mainetainer breeding heifer that I show and recently I haven't been doing so good. The judges have been saying she doesn't have a deep enough belly and rib. This is my 2nd year of showing and I need advise on if there is a feed supplement that I could use to deepen her through her rib and body or just any advise on what to do to make her a better in the show ring. Attached should be a picture of her.

What are you currently feeding her?

It"s a dunning feed mix that our local feed man mixes for us that his nutritionist recommended for show heifers.

What is in the feed? 

How much protein?

How much of the feed?

What kind and how much hay?

Agree with above posts...points to ponder.
1. Feed (show heifer developer?) - What is the formulation?
2. Amount of feed?  Looks like she could use more condition for show.
3. Cotton Seed Hulls or other fillers can help with "girth"
4. You need to work her hair.  Not everyone has the ideal set up, money or time but do everything you can.
5. Clip her.  Clipping her head, blending her shoulder, etc. would help her look.
6. Give her exercise.  Don't just turn her out at night.  Walk her every day.  I used to walk mine a mile morning and night.  Will help increase appetite, improve handling and firm her up.
Good Luck!

We feed a lot of wet beet pulp to our heifers helps give them a fuller look and can help add depth. We also feed Purina Depth Charge.

Shelby don't get too discouraged, you are in the learning stage if this is your second year, keep working hard and keep learning, there will be ideas here that will help some, but remember that great show heifers don't always, or even often, make great cows.  IMO it has something to do with how fleshy they have to be to do well in the show ring.  Hang in there and keep working hard she may not win a lot of shows this summer because she doesn't carry enough flesh to be smooth and deep, but she may give you some good steers to show down the road.

Congratulations on a nice heifer.
While feed is an important part of preparing an animal for show, the first thing you have to consider is the genetics and the structure of the animal. This heifer does appear to have a high flank and be a bit shallow in her rib design.  While feeding different supplements will help, it certainly will not "fix" her structure issues.  She will probably always be higher flanked and shallower in the rib cage than an animal that is naturally fuller ribbed and "soggy".
Remember what she looked like when she was a calf or when you bought her at 500-700 pounds?  In the future, try and avoid selecting one that resembled what she looked like.

Please do not get discouraged. It looks like your doing a fine job and are willing to seek out and learn what you are having difficulty with.  I can see you being very successful down the road!

As others have stated, I think its great that you are asking for help in learning and not just getting discouraged or bitter.  Yes this heifer needs some volume through middle, and high fiber products like beet pulp, cotton seed hull, depth charge, etc etc will help to an extent.  There are other things to analize that will help change the look of this heifer overall as well though.  There arent many "perfect"heifers out there.  Almost all of them have at least a small flaw somewhere that we would like to change, some have bigger flaws but are still generally good specimens when viewed as an overall package.  I dont know how old this heifer is, but one thing I tell almost all of the kids who ask my opinion, kids I help, at clinics I teach, or when judging a show.  It has been my experience that most heifers dont have the same look both years they show.  Some heifers are AMAZING calves and tend to dominate their first years, some heifers get outdone their first year but show amazingly their second yr or heavy bred.  I think its true that this heifer probably lacks a little of the pizzazz that gives them that little extra flash in the show ring, but down the road I think she will be a good enough cow for you.  I think she probably does a lot better in the ring as a heavy bred heifer than at any other time in her career though.  From the ground up we can help this heifer a lot by getting her feet trimmed, those long toes will rock her back.  Trimming her and getting her up on those toes will give her a lot more presence in the ring itself.  While I like a heifer that is long spined, which she appears to be, being long sided tends to exagerate the shallow appearance of one that is a little tight middled.  If you blow the picture up it appears that she has a decent hair base, with a little work it could be your best friend.  It looks like her belly is clipped pretty tight though, try letting the belly hair grow and pulling it down and letting that add some depth appearance to her.  Also as was said earlier if you will clip her tighter from her shoulders forward, not only will it make her look to have more extension, it will also make the front end look smaller which will in turn help make the middle look bigger. 
But dont forget that you have a quality heifer, she appears sound, has good bone, and is in good condition.  Keep working, keep learning, and be proud knowing you are doing the best of your ability with her.