"...สิทธิ์ในชีวิต สัตว์ควรได้รับความยุติธรรมในชีวิตหรือไม่..."

Absolutely! We also have to look at 'WHO' we eat to sustain our lives.

Buddhist Siila #1: we should commit (ourselves) to learn (how) to refrain from 'taking life' is a middle ground. The question is then 'when is it necessary (to take life/to test on live animals -- knowing that suffering is evitable)?'