the best animals for self sufficiency

[BDG]

There is a fox den within a couple of hundred feet from me, but being nearer the edge of town it is probably a lot easier for the fox to rummage bins and eat rubbish than to get in the chicken house.

Polecat and mink - you could try trapping but it could be a never ending task. You could build a house that they cannot get in, but the one night you forget to close it fully you will lose your chickens. Especially with the mink.