Initial Ideas

At this point in my planning I've started to think of some ideas for my final short film product.
I have thought about the following genres:

• Comedy
• Mockumentary

The idea I am currently most enthusiastic about is 'Horse Whisperer':

Brief Description:
The plot consists of a woman who supposedly can talk to horses. She has a very odd costume like a fortune teller but as a professional horse whisperer. This main character sees horses in a human played form, as if the horse is a person in a costume. When she talks to it, the horse is a person in a costume talking English back to her. The horse owner only sees the horse as a real horse. She doesn't understand the horse whisperer and thinks she is very odd. The short film ends with comical lines including the horse owner riding the person in a horse costume (this is seen through the horse whisperers eyes).
Genre:
Comedy
Characters:

• Horse Whisperer
• Horse Owner
• Horse (both real and pantomime/costume)