No way!! I am in the same boat, looking to relocate two states away, and one thing I am learning, short sales don't always mean short, they can, at times, take up to a full year before you can move in. I looked at a "perfect" property that had tenants (human ones lol) that they tried to say "came with", thought long and hard about it and walked away. I mean why take on more (possible) issues in your "new dream spot". That house is still on the market, in an area that even a week before Christmas if you take an extra day to look over contracts, someone else already bided!
Don't lose faith, wherever you are the spring market (literally waiting for Christmas to pass) will open up MUCH opportunity, without petty clauses demanding possible nightmare situations. And keep in mind, the bid you pay for the property is only ONE expense, you have moving costs, deposits for utilities, potential for new furniture/appliances, all new headaches, and you are considering adding the pressure of caring for animals that you don't know in a situation that doesn't sound like you can get out of for 12 months. I wouldn't take it on, what if they had to replace a bunch of stuff these horses destroyed just to list it??
You can always ask your realtor to take you there when they are home and discuss a contract outside of a contingency, feel it out, and perhaps help each other. But to attach it to the purchase price and agreement of sale? No way!
Best of luck to you, and again I know what you are going through, I am putting a bid on a house tomorrow that I originally loved, got out bided back in Nov and their financing just fell through, relisted this afternoon, fingers crossed! Stay positive, and invest in your dream, not a potential situation that may leave you wishing you never got involved.
Best of luck!!