I will make this short cause it is kind of long... I am somewhat a new rider have a first horse, well kind of like my 2nd horse first on I had for 2 weeks and he had to go back was lame.. Ok so now I have a mare 14 years old and 15h. I have a size problem wanted something smaller but when I first found her she was a dream so mellow and sweet.. I got her on July 4th and is being boarded at a friends house. I know she need to settle in but she was kind of spookie always looking for something to happen. So gave her 2 days to settle and started doing Parelli ground school ( not for her BUT for me to get use to her) things going well... THEN... a few days later she is in season..OMG what a goof ball, she was not bad but would not let me touch her and was very SPOOKIE.. She lives a pen or 2 away from a stallion.. I know not a wise place to have her..but he was ok with her in season.. So after 7days of her sillyness which I did not take her out, (I would brush her and pet her as much as I could from her pen.) she has gone out of season. She is still spookie so I was told to give her a small amout of Valerian Root, I did yesterday and she was calm got to do some ground work in the round pen. Had a happy day Today was a different story.. gave her the root and NO she was not calm!! So another surgestion was to start her on wild yams?? This is to help her calm and maybe not so spookie. I have only rode her once since I got her cause I think the ground work and bonding should take place first ....right?? Ok next question since I do not know this mare very well she was sent to me with a tom thumb bit, was told not to use it! Remember I am a beginner rider so my hands might not be the best on the reins, what kind of bit should I use? Something that has a presignal so I don't hurt her. She seemed to be calm and do what was asked but that was before she was moved to her new home.. If you can help please let me know... Thank you