Everyone is bothered by the wire. I have a bigger problem with the halters. They need to come off. Worst case, the horse gets hung up on the Tpost and snaps his neck in the struggle to get free or at the very least, the abraision leaves permanent marks like they are on the draft.
It's interesting to me that the people that have the greatest adversion to feeding alfalfa are those who do not live in an area of the country where alfalfa is a predominate forage option. Ask any vet in AZ, CA, or most any area in the West or Rocky Mountain region and they're not going to have a problem with alfalfa. More horses colic, founder and develop metabolic issues from green grass, immature grass hay and grains, not alfalfa. If you look at hays, cool season grass hays (fescue,orchard, wheat, timothy and brome) have a propensity to higher NSC than alfalfa. The growing conditions, maturity at harvest and the harvesting itself is going to have a dramatic impact on NSC as well. NSC of grasses can typically range from 8-25%. Alfalfa is typically in the 10-14%. Alfalfa has the added benefit of higher minerals and vitamins that can dramatically reduce or eliminate the need for concentrates. With a higher caloric content, you can also feed less thus reducing your feed cost and you tend to have very little or no waste. There is nothing more aggrivating to me than horses who waste hay. Is alfalfa perfect? Of course not. You do need to manage it. Most horses are self limiting on grass hay but will eat and eat and eat alfalfa resulting in one fat horse. They tend to clean things up instead of leaving some to pick at later. It is lower in fiber so it does not generate the same amount of heat grass does in the digestion process. Just like all hays, alfalfa comes in a variety of quality. Only the best is used in the dairy industry. Lower qualities, RFV up to 140, tend to end up being fed to cattle, horses and other livestock. Alfalfa that is rolled, will be at the lower end. It will be more mature, an older field with more stem to leaf ratio, have lower calories, maybe rained on, discolored.... All the things that make it even better suited as horse hay.
The bigger picture is this is an unusual year for hay due to the situation in TX and OK. Hay is limited and you have to be willing to think outside the box and make it work for you. If you live within a days drive of TX and OK, alot of your hay is leaving the state causing your prices to skyrocket and very shortly, there will be no hay available. My hay prices are already 250% of normal. They are never this high even in the spring when typically they get to be 175-200% of summer prices. Everyday you wait, prices will go up that much more.