Wanted to take a minute to let you know as far as my reading goes that goat kids need to be tattooed at 6 weeks of age. If you tattoo before this the ear is still growing well and the tattoo may become stretched out and hard to read as it ages. If you wait until they get too old though they become stronger and are hard to hold still. I will suggest that the best ink buy according to my reading is the green paste in a soft tube. We have two people during this procedure, one to do the holding and the other does the ink rubbing and tattooing. We first clean the inside of the ear with alcohol on a cotton ball and clean it well. Next, put on disposable gloves and rub the ink onto the ear where the tattoo will be, then tattoo the ear, then rub more ink into the sight and rub really good for at least 30 seconds. Right ear should have “Your Herd Tattoo” in it and left ear is the ear for the year and number of kid born. So this year is 2019 and the letter will be L and the number is the order in which they were born. For instance, if I have had twins born first, the first one born will receive the letter L and the number 1, L1, and the second twin born will be L2, and so on like this. Do not wash the tattoo ink off, let it alone, it will wear off soon. If the goat is going to be registered it is also supposed to be tattooed. Any tattooing device is bound to get the job done, no need to buy the most expensive one. Hope this helps.