So I have had my 8 year old gelding for about 8 months now.
When I first got him, he was the perfect horse for a beginner (I'm definitely a beginner)
About three months into owning him he got extremely buddy sour towards my 18 year old mare. If I tried going down the road and someone riding my mare would try going a different direction, my gelding would act up and try bolting towards her. Slowly we got over this.
Now he spooks at everything, and nothing. It's ridiculous. He NEVER spooked with his previous owner.
I thought maybe his saddle, bit, ect maybe was bothering him, but he spooks when I'm walking him around with the lead rope, and when he's tied to the wall as well.