Out California Way (1946)

Newcomer Monte Hale is tying to just get a job in western films when he meet young Danny McCoy and his sister Gloria Danny is trying to get his horse Pardner into films Monte sings a song and Pardner does some tricks and a casting director notices Monte gets a singingcowboy role and the horse gets a bit but there is an accidental explosion engineered by western star Rod Mason who is jealous of Monte and the horse is badly scared and blows his lines