Animal sacrifices mentioned in the suttas or vinaya?

Hindus believe that the Buddha opposed Vedic rites of animal sacrifice in his time, for example, on this page and on this page . This apparently influenced later Hindus to abandon the practice of animal sacrifice. In the suttas, we find the Buddha forbidding taking of a life, and this is the first precept. But are there any sutta or vinaya references showing the Buddha explicitly opposing animal sacrifices as a religious practice?