frisky
adjective informal uk/ˈfrɪs.ki/ us/ˈfrɪs.ki/
（人或动物）爱玩的，活泼好动的
(of a person or an animal) liking to play or full of activity
It's a beautiful horse but a bit too frisky for an inexperienced rider. 这匹马很漂亮，但对一个没经验的骑手来说有点儿太好动了。
Compare: kittenish skittish