Did they drop weight recently or is this how theyve been for awhile and you have problems getting their weight up?
How long have you had them and how long have you had this particular feed regime going on? (Takes alot more time to add weight than to drop weight).
And, what type of horses are they? ( some are stockier than others, and if theyve been this way for awhile could be their build) young? Old?
Do you have pictures? Maybe give the vet pictures? I know I've been flat broke before and my vet has been very willing to consult with me about various things.
Good advice so far, but these are questions that enter my head that may play a factor.
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