According to Buddhism tought that, "Buddhists say that this is morally wrong if the animal concerned might come to any harm.
the experimenter will acquire bad karma through experimenting on an animal.
The doctrine of right livelihood teaches Buddhists to avoid any work connected with the killing of animals. The doctrine of karma teaches that any wrong behaviour will have to be paid for in a future life - so cruel acts to animals should be avoided and Buddhists treat the lives of human and non-human animals with equal respect