My horse since being on box rest gets very anxious when being stabled, even if there are other horses in as well. I have been bringing him and out twice a day and making each time a good experience and extending the time. However due to ongoing wet weather and other illnesses/injuries he needs to come in at night. I have given him a small dose of sedalin when he has come in but am concerned about the long term use and cost of it. So am wondering if there are any alternative methods out there. My boy in general is stressy and anxious. I have tried magnesium based calmers before and if anything seem to make him worse. Any suggestions?