A team of rabbis from the Temple Institute flew out to inspect the calves last year. The requirements are incredibly demanding, requiring that there be no more than two non-red hairs on the entire calf. It must also never have been used for any labor or have been impregnated.The heifer must be two years and one day old to be suitable for the ceremony. Sometimes, a calf that is perfectly red when it is young develops black or white hairs as it grows older or may develop a blemish. Sometimes, the colored hairs fall out or disappear. Certifying the calf requires a complete and intensive inspection in which a rabbi knowledgeable in the laws goes over the entire calf with a magnifying glass.
Where is that written? How Jesus would react! LOL!
It was the mass of technical rules like this that Jesus complained about in the Gospels.