The bit that I thought made really convincing film footage, was when they were out on the porch talking between each other, and they caught a good glimpse of something way up high, which was a brightly lit white orb-like object.Travis doesn't make final decisions in such circumstances, the team has a specialist in sensor and video technology, and he spent some time analysing the footage. His decision was, and I think he was correct, that it is not a fly. As for the cow's reaction, it may not have been that it saw the object but sensed it in some way. It is only one of multiple events on the ranch. Taking one instance of activity in isolation from the other phenomena is unwise. Here's another example. A local amateur astronomy group with extremely sophisticated gear was asked to study the mysterious area a mile up, to see whether the stars in that area of the sky showed any distortion (i.e. showing that some cloaking device was in operation). Their telescopes were all equipped with the latest very expensive software, comprising comprehensive star maps, so it should have been an easy job. In fact, none of them could do it because their star map programs were immediately immobilised and apparently lost all the location data. They were not pleased (I imagine they were compensated for the damage by the TV company!). Another example of dimensional shifting -- as I mentioned Travis went up in a helicopter to drop sensors through the mystery area, and most of them vanished and the ones that were recovered had bizarre data. But the strangest feature was that Travis was sighting straight down and dropping the packages directly above the mystery area (known as the triangle), but when the data were analysed they showed the helicopter hundreds of meters away from the triangle and actually above the mesa. (Other attempts to use helicopters or small aircraft also failed in weird ways.) I'm not going to keep describing the hundreds of weird things that go on there -- if you are interested, get the DVDs, then see how much you can explain!
Then it seemed to disappear for a short second or two, then re-appeared some distance away then vanished.