I didn't realise that a collie/grey can come with a lot of baggage: heading for home at the sound of an exhaust, a firework, thunder or gunshot. Constantly wheeling, circling totally hyperactive despite plenty of exercise, mental stimulation and work. Mine was extremely neurotic:-hated other dogs and attacked them through fear, fearful of any change in her routine, for example she would foul her run if my Mrs fed her instead of me, every time. I had to sedate her at firework time and even when I went on holiday otherwise she would pine,refuse to eat and foul her run.
She also ran hot and cold