Hi everyone! I am back once again seeking feeding advice. I am strongly considering switching my mare’s grain from the locally-produced feed provided by our farm to a Seminole feed. She has been doing fine on the barn’s feed and looks wonderful, but she is going to be transitioned from timothy hay to the barn’s rye hay now that she has started turning her nose up at the timothy hay. I am concerned that the high NSC content of the rye hay along with the high NSC of the barn’s feed would be too much sugar for my mare.
I have been a huge fan of Seminole’s feed in the past (my previous hard-keeper gelding absolutely blossomed on Dynasport) and would love to start using their feed again for my mare.However, I am on the fence about which feed would best suit my mare since I have never fed any of their other feeds besides the Dynasport. My mare and previous gelding are complete opposites, so I’m not quite sure that it would be a good fit for her.
My mare is your stereotypical hunter - warmblood build, muscular, a tad on the chunkier side (a healthy weight but not your venter body type), and super lazy and quiet under saddle. She is a moderate keeper (not an air fern but also not hard to keep weight on) who is worked moderately 4-5 days a week when weather allows, has access to quality pasture for about 12 hours a day give or take, is eating roughly two flakes of rye hay when stalled, and is getting two scoops of Platinum Performance Equine Wellness a day. Like I said earlier in my post, she is going to be switched over to the barn’s rye hay this coming week as she has started to turn her nose up at the timothy hay she has been eating for the past few months that I have had her. My guess is that the hay I have been receiving from the supplier has been more mature than the previous cuttings resulting in her leaving a majority of the hay untouched. This past month I tried transitioning her to an orchard/alfalfa mix hay since it is good quality and more nutrient dense, but the alfalfa has made her an uncharacteristically spooky mess and has lead to some very loose stool.
Although I am not an expert on horse nutrition (obviously lol), I have a bit of knowledge about it from a college course. I know that she needs a feed that has no more than 12% protein since she is not in heavy work and does not have a high protein requirement, and she should probably be fed a feed with a low NSC content due to the high NSC rye hay she is eating. The part that I am unsure about is which crude fat and crude fiber content ratio would best suit my mare’s needs. The two feeds I am trying to decide between are relatively similar except for the crude fat percentage.
The Seminole Dynasport has 12% CP, 14% CFat, and 18% CFiber with an NSC of 15%. The sugar is also low at 6%.
The Seminole Wellness Perform Safe has 12% CP, 8% CFat, and 21% CFiber with an NSC of 13%. The sugar is lower at 4%.
My gut is telling me that the Perform Safe would probably best suit her needs as it is going to be less calorie dense than the Dynasport due to the lower crude fat and higher crude fiber. However, I wonder how much of a caloric difference there is between the two.
To get to the point, here are my questions:
Should I just keep her on the barn’s feed since she looks wonderful right now even though she will be getting a more sugary hay? As some people say, if it ain’t broke, don’t fix it.
Do any of you use Wellness Perform Safe and would be willing to share your thoughts/sucesses/letdowns?
A huge thank you to every single one of you for sharing your knowledge with me! 
