A few years ago I worked on a ranch west of here, we calved around 750 cows starting in January.
Sometime in late March I grabbed my flash light and went for a calf check when it was my turn to come on duty at 2 AM.
I was standing in the matternity pen, there were some commercial heifers calving and one or two that had calved in the night.
I pushed these pairs into the barn to dry off and mother up as it was quite cold and everything was covered in Frost, when I thought I was finished, I took a last look through the matternity pen and heard a soft high pitched calf bawl.
I couldn't for the life of me find the soure and nearly left again thinking I was hearing a calf from some other nearby pen, on w whim I climbed over the fence and was about to walk down an Alley to check another pen thinking a calf was caught or being laid on and I found in the Alley a Tiny Black Calf that had either been pushed under or crawled under the bottom plank of the fence.
I don't remember exactly what it weighed but I think it was around 30#, it was obviously a bit cold but didn't seem to have frostbite anywhere so I picked it up and took it in the office and laid it on a blanket in front of a radiant heater to warm up. I tried to feed it some warmed collustrum that we had on hand from a local dairy but ended up tubing it.
I know this part might sound silly but we had a HECK of a time figuring out which heifer was it's mother (we calved out 130 heifers that year).
Finally decided on a small black heifer that looked like she had next to no milk, ran her in and palped her and she had claved but she had zero interest in the calf.
The heifer was later moved over to the feedlot and culled.
I tubed that calf for probably close to a week before it would nurse at all, finally got it grafted onto another heifer that had lost a calf.
I don't remember exactly what happened to "Tiny" anymore but for some reason I don't think it survived until weaning.
Anyway,
Just a recollection of mine.
I hope you have good luck with your "Little Project".