HORSE SABOTAGE, healthy horses quickly became very thin!?

Question

I am a veteran horse owner/breeder of halter and performance horses, who recently moved with my sister, next door to questionable horse owners, due to physical disability and financial hardship. They were VERY unhappy (perhaps even jealous) that I moved next door to them with 4 nice horses, 3 mares and a stallion, and made it well known they did not want them there. My 2 mares closest (nearly at arms length) to them began to rapidly lose weight, in spite of my efforts, at an alarming rate. My big mare 17 hands 1400 lbs. lost weight as well, but perhaps because of her condition/mass, she was not as affected as the other two. It was also made well known that my stallion was admired, and was considered as a breeding prospect to their mares, he never lost weight. I have since placed the mares in a new home. My question is this, I hate to suspect, but could they have been giving them something that could affect there condition that rapidly? I have never experienced this and have no idea!

Answer 1

Have they filled out after they got rehomed?

Could they have been stressed by the move?

Are you affected by West Nile Virus? i think horses can get that?

Your gut instinct might be totally right, either way these people creep you out, so I hope you can protect yourself and your horses from them, and anything else harmful. Good Luck

Answer 2

The first answer may well hold the answer, especially the move.

Could the neighboring horses have some kind of worms or the like that could have been transmitted?  That doesn't explain the male not losing weight.

I think if the neighbors were that hateful that they would be stupid enough to have used something that would have made the horses sick or die.

Answer 3

ask you vet if a blood/stool test might still show something. Because if you didn't change anything you were doing something made them loose weight. You might need video camera's to watch out for your other horses.