Just because the majority of apparently mysterious cattle mutilations are done by insects, that does not mean that all are explainable by known processes. Assuming that the problem has been solved involves the same fallacy as observing a number of crows, seeing that all are black, and concluding that “all crows are black.” White ones are also found, if you look at enough of them.
Not all cattle mutilations are easily explained. The mutilation in the video linked below, for instance, cannot be explained by bloating and insects. You will notice that the calf is very fresh when the veterinarian is examining and photographing it. We also have the testimony of the rancher that this happened only a short time after he tagged the calf.
This is what the skeptic’s dictionary says about the subject (editing out the sarcasm and insults)–
“…bloating often leads to skin splitting in straight lines resembling incision and exposing internal organs. …there is little or no blood oozing from the wounds because blood settles, the heart does not pump when an animal is dead, and insects devour the blood that does spill out. (There was an) experiment done by the Washington County (Arkansas) Sheriff’s Department. They placed a dead cow in a field and had observers watch what happened over the next 48 hours. …they reported that bloating led to incision-like tears in the skin and that blowflies and maggots had cleaned out the soft tissue so that the carcass looked exactly like those that had been attributed to aliens or satanic cultists.”
This is the video of the experiment, from a National Geographic special–