I have taken several heavy females in February and March. You can get a bunch with one shot, the most I took was a female with 13 pups in her. Snares are a very useful tool, as with so many other things they can be abused and misused. They defiantly aren't fool proof they can freeze with snow and ice; the wind can blow them shut; you can set them where the coyotes will get their front feet through them and get catches around the mid-section instead of good neck catches. At this time there is a trend of using smaller locks and smaller cables here. They are using 1/16" locks on 5/64" cables and locks for 5/64" cable on 3/32" cable. It makes them slower; I saw a guy had one by both back feet the other day, he was using a 1/16" lock on 5/64" cable. I said something to him, and his reply was will it worked I got him didn't I, he didn't see my lock or cable did he. Okay. The reason for me being there was coyotes backing up getting the cable in their mouth and chewing through it and being gone. I am not sure how to help solve some problems, I don't think that I can. I might have to try a few of the lock washer break- aways I wonder how grade 8 lock washers would work instead of the grade five washers. Quite a difference in the metal they are made of. I am amazed at times how big a hole a coyote will dig and at other times how small a hole they will make and use.