Here are some wire-service photos of the happy ritual (I especially like the first one with the animal depicted on the upper-right):
Ironically, the main place one can find serious objections to how the ritual is performed is on an Islamic webpage:
In current time, though, this sacrifice has devolved into a largely empty ritual. Muslim critics have come to recognize that Islamic standards of compassion to animals are violated by efforts to provide sacrificial animals, such as the mass transport of sheep in overcrowded, filthy conditions from Australia. These animals are denied food, water, and medical attention during their lengthy overseas journeys. Such treatment is a clear violation of Islamic teachings.Snapped Shot has also noted PETA's hypocrisy. Sweetness and Light has more gruesome photos.