I am quite confused with the behaviour in one of my horses. She has just turned five and is having some behavioural issues such as fairly serious separation anxiety and general nervousness. In training she gets very nervous if she doesn't have another horse or a person to rely on. For example, I did a bit of free jumping with her a couple of small jumps and she had no concern about the jumps themselves, but seemed scared of the thought of being sent away from me. Often she gets very nervous and insecure and I'm unsure if this is normal and what people do to help with this situation in young horses. I am looking for advice now as to hopefully ensure the problem does not get worse and I can help her with her confidence. I don't believe she is being pushed too hard, I have taken things slowly with her and have try to make things as simple and clear as possible. Also I don't think she is incapable of the work she is doing, she seems like a very intelligent and naturally courageous horse but I think I must be going about something the wrong way. For background information she has been off the track for over 1.5 years and been in light work for about a year and is just started to show these signs.