Rhetts, that looks like a very small calf, but I have no experience with Highlands.
Ralphie, that video clip sure looks to be Bogtown, and I don't know of anyone else who would do such a thing.
It is disheartening to lose chicks, but they will for many reasons not all survive. If they are very weak or deformed at hatch the best thing is to end their suffering. I know it is not an easy thing to do, but it is for the best.
We estimate the calf is about 18 inches from the front shoulder down to the hoof. Yes, very small.
Thank you. Mom's name is Norma Jean.