A lot of small breeders just do numbers without letters and our ranch brand. The number may not match with the animal's number, but the number is unique for that animal. I ordered 1-100 and I am in the 70's now. Once I reach 100, I will order 101-200 for my next tags. So, any future chins I tag...I know that they will not have the same number as previous animals I have tagged. 100 tags can last a small breeder several years. It's not worth it to special order 20-25 tags each year with the letter/number combo, especially if you do not tag every single kit that you have born.