Join Date: May 2009
Location: Mid Northern TN
No, the seller has no responsibility unless you had a health clause in your sales contract. Horses are generally sold 'as is' with no warranty or guarantee and it's buyer beware.
That said, just because her feed aren't the best right now doesn't mean much. A good farrier should have a plan for how to improve her feet and keep her sound on your terrain. So what does your farrier think you should do? Good feed and good farrier work can help most horse's feet, and if she's not lame now, it's a pretty big leap to assume she will and that it will be bad enough she needs to be sold/returned without even giving her a chance. Unless there are other reasons you don't like her, anyway.