I agree that you'd rather have them a bit on the thin side rather than pudgy. I think she looks really good right there. It's fine if you can see a hint of rib on a growing baby. So long as they have access to good feed and they are healthy (energetic, shiny, etc), then they're fine.
In my experience with youngins, they tend to fluctuate a bit in their weight as they are growing, and can't really expect them to look as filled out as an adult without them being overweight.
Breed is also a factor, as some are naturally slimmer than others in their optimal weight (take a thoroughbred vs. a quarter horse). My horse stayed slim most of her life, when she was about 4-5 she thickened up, filled out more in her butt and chest- and now at 6 with her recent growth spurt has thinned down again. She is an arabx, and looked more Arab in her younger years, then more quarter horse when she started filling out and maturing more. She has never been considered underweight.
I think the scale is okay as a general reference point, but by no means matches every horse. The paint out here grew ridiculously. He has only just recently, at 7 years old, started looking normal (I've known him since a yearling, and... Well, good golly the guy was fugly, he'd have 1 month out of the year he looked proportionate to himself).
I would say, if you are really worried about it- then ask your vets opinion (since they can come and actually look).
I have a Half-Welsh, and he has always been on the thin side too. His hips were the main spot that looked like they needed more padding to me; so I think that might be a breed thing. He is almost four now, and he started to fill out a bit when he turned three. Whenever I asked my vet and farrier about his weight, they said it was appropriate for his frame and that they liked to see a growing horse on the thin side rather than heavy.
Thanks for the reassurance! I guess I will write it off as normal for her, she is active, eating, playing, and seems healthy otherwise. She has had a few growth spurts lately, she is just a little butt high right now, and her shoulders have been evening out nicely, it's mainly her hip bones that have me concerned the most. I will try and get pics of what I am talking about, but I am having the vet out for spring shots within the next month, I will inquire about her weight/condition then.
She looks to be in good weight, even though all her fluff is hiding her. It's actually a little preferable for a growing horse to be a bit on the thin side rather than on the pudgy side. I have a 10 month old Paint colt and he is definitely not looking in the muscle department, but you can still feel/see his ribs. He probably weighs around 450-475 currently so he's right up there with your girl.
Why are you feeding a vit/min supplement if you are feeding the JuniorGlo? If you are feeding the recommended amount (which you are), then there's no reason to feed another vit/min supplement. Over-diosing them on nutrition can also cause problems.
Tho I am a fan of the Dynamite line, I would pull it since you are feeding the JuniorGlo. If you want peace of mind, have her tested and see if she has a certain deficiency (which in that case, you would want a specific supplement).
I'm not a fan of pumping babies full of all kinds of things. I like to keep it simple. I've seen the aftermath of a baby that grew too fast and ended up with lameness issues.
My yearling is on TC Growth, cocosoya oil (small amount) and probios (for a limited time bc she was in a high stress situation recently).
between a 4 and 5 on the Henneke body condition chart, which I feel is too thin. I can feel her ribs and her tail head although they seem well covered, her spinal column has decent padding on each side but I would like her to be more rounded
Then I respectfully feel that your idea of 'too thin' is probably out, (if talking health-wise). That sounds about right. You should be able to easily palpate these bits. Also she's only a yearling - expect her weight to fluctuate for another year or 2 yet.
5lbs ADM JuniorGlo a day with about 1/2lb HealthyGlo stabilized rice bran for added fat/calories, in 2 feedings, along with Dynamite vit/min sup, and Dyna-pro pre/pro biotic. She also gets free choice loose minerals, Dynamites 2:1, 1:1, NTM salt, and Izmine as well as an iodized salt lick,
I would suggest feeding her in more, smaller meals if possible, if she needs that much. You do realise that the Junior Glow is predominently rice bran too? Have you done a diet analysis to know what she needs, or are you feeding all those supps 'just in case'? If you haven't done an analysis & worked out what exactly she needs(& doesn't), you could be causing more imbalance/overload probs with all those different supplements & fortified feed.