Hi, IMO grass hay(pref low NSC) with a little alfalfa is generally good. If she's on the bigger side for her age or is plump, cut down/out the alfalfa. I would also be looking at an appropriate nutritional supp to 'fill the gaps' but it depends on basic diet as to what she may need.
Why are you feeding her sweetfeed? Does she need extra energy? Any grain or such is best fed over a few feeds daily rather than just once. Not knowing what your 'sweet feed' is, can't say whether I'd disagree with the 'good quality' but it is generally rubbish. Of course not always but I have found you do tend to get what you pay for, so $15/85lb may not be a good deal for her as it seems. Even if not, if she needs something more, I'd choose an unsweetened, low carb alternative. Such as upping the alfalfa a little rather than grain.
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Last edited by loosie; 08-11-2013 at 04:31 PM.