Sorry to hear ... hopefully insurance will cover your loss.
I've had issues with couriers in the past one even signed my name for me and left a laptop on my step - I complained and I don't think he works there any more.
Not sure what delivery service/terms you had but the following document outlines the terms of service for UPS
http://www.ups.com/media/en/ca/terms_service_ca.pdf
Page 12 item 18 is quite concerning for any livestock deliveries ...page 13 & 14 has details on loss/damage and claims.