A humble pigeon accused of being a Chinese spy was released this week after it was detained by police for a staggering 8 months. As silly as it sounds, there have been documented cases of animals being used in spycraft. The CIA is reported to have trained ravens and pigeons, and even dolphins have been used for underwater combat by Russia. The poor pigeon was released on TuesdayLast May, officers in India captured a pigeon near a port in the city of Mumbai, the Press Trust of India earlier reported. Upon closer inspection, the police discovered two rings tied to the bird’s legs with what appea…