Is there a word for an animal when it freaks out? Stampede is a good word but it seems it's used for a group of animals based on LDOCE. I need a word with the same reaction from the animal but applied to one. Think of this: your horse starts neighing, jumping up and down or running around and you don't know why maybe it heard a gunshot or saw a lion or something.
Another option is shied, though that one is mostly used for horses and is sometimes less severe than being spooked.
verb (used without object), shied,shying.
- (especially of a horse) to start back or aside, as in fear.
From the dictionary.com defintion of shied.