I think Ariel makes a good point that I honestly had not been considering, this item really is relatively small for something used as a sacrificial implement. Even the tulwar hilted koras of Bengal used in sacrificing doves are of good size and heft.
Perhaps this may indeed be a votive or ceremonial piece that is an interpretive example of the larger weapons actually used?
That brings to mind discussions some time ago of the Afghan 'lohar' and whether its rather diminutive size would disqualify it as a practical weapon. Also there were claims that these functioned as utilitarian ice choppers etc. and it was suggested that these were likely modern versions of the earlier examples that probably did serve as weapons. The more modern examples were basically interpretations that served recalling the traditional form much as smaller examples of other weapons such as miniature swords used as letter openers and the like.
Obviously I am not implying such a mundane course for this intriguing example, but would consider the possibilities of more votive use as being plausible due to the size.
Like Lewis Carroll......curiouser and curioser!!!