Apologies, Ricardo! I forget not everyone here is a wrinkled old man like yours truly!
"Trigger" was Roy Rogers' horse (a Palamino, I think) from Roy Rogers & Dale Evans fame. You probably recognize the names. They did a lot of cheesy, "musical" westerns that I suppose were supposedly dramas (?). Never was a fan myself, though. In fact, it was actually even before
my time! Besides, when it comes to Westerns, we all know that the Duke and the Man-With-No-Name rule!
(BTW: After Trigger died, Roy Rogers had the entire horse stuffed! I think it stands in some museum somewhere. Musta' had some kind of weird thing for that horse....no, I won't go there!
)