i have to run the ecollar on sue, she always starts out open until zzzzzap then she doesnt make a peep until she sees a porker. my young pup cowgirl will start doing the same thing that sue does if i forget the ecollar. i think it is monkey see monkey do.
if sue aint around its a silent hunt.. i wish i could break her of it. she stops barking after about 3-4 minutes but it sure gets loud when the tail gate drops.