I am hoping to establish a tattoo based identification system for my 10 ewes and replacements that I will be keeping from this lamb crop. 4 ewe lambs on the ground so far. At any rate, I have a small 5 digit 5/16 tool. I'd like one of the tattoos to be at the very least the month and year of birth, and on the other ear the personal identification number. Does anyone use tattoos as opposed to tags for ID purposes? Since I have such a small flock I'm able to tell each individual sheep without having to check tags so I don't think this would really cause too much trouble. It is also permanent where as tags can get lost (and do! along with part of the ear). I'd welcome any thoughts re: pros and cons of this method. Thanks!