Kingfisher
Well-known member
Can someone give me instruction or point me toward some on how to draw blood from my heifers? I need to preg check them. Thanks in advance
If you hold it too high it will pinch off the tail vein. 45 degrees from the cows spine is than 90ricebeltrancher":2b0rlkbh said:I use a 3 cc syringe with an 18 ga needle. Much easier, to me. Have someone hold the tail straight up. Wipe the underside reasonably clean in the area where you're going to draw from. With your left thumb (if you're right-handed) find the groove that runs down the middle of the underside of the tail. Stick the needle straight in at 90 degrees roughly even with where the web on either side of the tail attaches to the tail, usually about 1/2" deep. You might hit bone. Pull back gently on the plunger. If you don't get anything, play around with it, further in, pull out a bit, etc... If you still don't get anything, start over an inch or so up or down the tail. When you get 2-3 cc's, stick the needle into the top of a blood tube...the vacuum will draw the blood out.
Hook":1dipliaw said:http://www.biotracking.com/resources/videos