I had to smile when I saw the original picture & read all these posts! A friend of mine & her husband own this cow...she really is as beautiful and impressivel in real life as she is in the picture!! :)
We had the same problem with calves either born dead (full term) or not nursing/nursing once & then dying. All calves born alive get selenium shots, but it didn't seem to be helping. We finally had some blood tests run on the cows & they were the ones really low in selenium. We never thought...
Plain old vegetable oil/cooking oil....a bit messy, but works great if you rub it in well with your hands & a comb, then just washes out. No harm done to the animal or the hair.
Lots of first-time lambers are scared of their lambs!! The head gate usually works, but you will probably still have to hold her still for the first few times, as she will still stomp & kick. Also, maybe give her a bit of grain as a distraction while you have the lamb suck (gives her something...
Sorry....just have the general manual for the truck (Lord only knows why it's still here...truck was stolen 3 years ago!) and not the book for the motor. It's en français too, although you seem to "parle français très bien"...! did find a site though, maybe you've already tried it, but if not...