is there reason to think that foxtails have gone in to him? has he shown any signs of this, swellings, lumps, coughing, blood, trouble going toilet??? foxtails are everywhere, not just in your yard, my dogs get covered in them at times, i brush them out when get home, and spend time running hands all over fur to find any that have been missed, but have never in years had any dog that has had a problem. ....was there a problem for you to be taking dog to vets in first place? where do they think foxtails may have gotten in to your dog and why do they think it? they would not just open a dog up to look just in case, they must have reason to think it first!