If this is to test colostrum transfer it MUST be done 48 hours ( IGG) or 1-7days ( tot protein ) or 2-5 days with Brix after tubing them.

You need red tubes, vacutainer needles and holder.

Assemble like this with the tube half on.

Hold the calf in the corner of a pen like this.

Find the neck vein just like for milk fever in a cow. Remember blood flows down to the heart so block off low. If you take your fingers on and off you will see the vein empty and fill like this.

Insert needle on angle like this and push the container completely on.

Use a new needle and tube per calf.

Interpreting results.

IGG <10 mg/ml

Tot prot < 5

Brix <8.5%

This is failure in passive transfer