I would like some recommendations on good mice ear puncher. I've been using a scisor model from Braintree, but it never cuts the ear hole off, the tissue always keeps hanging attached to the ear and i have trouble cutting it off to genotype. I contacted someone who sharpens our surgical tools but the guy said they can't properly sharpen those punchers. I need one that properly takes the tissue off the mice's ear so I can use it to genotype. Thanks.
I had the same problem when I was maintaining a large colony. Luckily, we also had the same scissor style ear punch but one size larger that is designed for rats. This one worked great for me for mice. The hole is a bit bigger but the skin never grows back or incompletely punches. I never went back to the mouse version. If you can borrow one, try it. I think you will be happy with the result!
This is the type we use: https://www.fishersci.com/shop/products/fisherbrand-animal-ear-tag-punch-punch/13812201
It easy to use, cheap and make perfect holes. We have used it for more than 25 yerars.
There are several brands for the same type.
Regards
I have used the same What Rafael mentioned. Also trick is that you have to punch with quick and firm force not slow force. That may help a bit