I lost 2 last year, and I lost one twin this year. This years was a twin, it was the second one, and I didn't suspect a twin since the first one was 110 lbs, but there was a twin when I checked about 30 hours after the first (the cow was MEAN, which didn't make me want to check earlier), butt first with hind legs forward, so after fiddling around in there for some time (1900 lb cow isn't easy to reach in), I hooked on to the calf and got the legs all straightened out, and still had quite a time pulling it. It had several injuries to it, the navel was badly torn so you could see the intestines, the teeth were pretty ripped up, and it had a bit of a tear in the skin on the groin too. It was DOA.. and 110 lbs as well... so she had 220 lbs of calf in her.
As for yotes, they haven't given us much grief.. they haven't even stolen a chicken in about 3 or 4 years, and have never bothered the calves... I do find yote craps in my corrals, but the cows would let me know if there was a problem, I sleep about 100 yards away... they seem to know the difference between cougars and yotes, or black and grizzly bears.. They *really* raise a fuss with a cougar or grizzly around, but don't think much of a black bear.
If the yotes come around in the daytime (when the chickens are out), I'll knock one off and the rest smarten up, I know there's about a dozen of them in the area, but while they behave, I'll let them be relatively in peace... Neighbours dogs on the other hand... well, we have a reputation of being a black hole for fidos. We also have a pair of ravens who clean up afterbirths and hop around the corral, they haven't caused any grief either... the calves usually just end up running after them and having fun.
