If you have a deep freeze that is not frost free- the colostrum should be ok. If your freezer defrosts- it will ruin the colostrum. My chest freezer stays at 0ºF and doesn't defrost, The colostrum is at the bottom of the freezer. It should be good, as no air gets to it, it doesn't thaw- and I had a batch tested a few years ago that was 3 years old. It tested the same as new colostrum. ( Lab in Akron, Oh. tests milk for shipment and colostrum for antibodies).
When you have a hard headed doe, force and teach her how to be mama.
Tie her up and one back leg so she cannot kick. First milk her some and feed the colostrum in a 12 cc syringe no needle slowly at the back corner of the mouth. Do this evenly both sides per kids.
Then try to latch a kid onto her. By doing this you help make it less painful.
After they kid, they hurt.