butchering

Oh dear. We'd earmarked two older ewes for slaughter at the end of October and I've had one separated for fattening up over the next couple months. I just added the other to the same pen today, with, (yes, I know you're going to think/say I'm an idiot) my lovely, newly purchased texel ram...

We are running into issues where sharp bone ends on the legs are puncturing our freezer packaging. We are currently using a cleaver to chop the legs off. Is there another tool or another method that would make for a cleaner cut, cleaner finished product? Thanks!