Ridecamp: [RC] Silver Lining Herbal Equine Supplements???

My mare has been alone now for over a year. She has been very wonderful to work with on a one on one basis. She has been less spooky on the trail and easier to ride by myself since she has been alone. BUT now when I bring her around other horses she becomes very insecure and "marey"acting, sqealing, pinning her ears and very bothered in general. Riding with other horses she is not happy in front or behind. I called a herbal specialist and they suggested that since she has been alone for so long that she has probably stopped cycling, and has a hormone imbalance. I am basically throwing this out here because I would like to know if anyone else has or is dealing with anything simular to this. She has also developed a very cresty neck and her weight has really shifted  to the heavy side. ( She is being ridden 3xs week and is eating grass hay only) The herbalist also suggested that she may have toxins from her kidneys not functioning correctly. 
Sooo anyone out there every try the herbal product Silver Lining Equine Supplements??? and do they work??? Thanks in advance! Linda