Maybe one of the electricians can chime in but the way I understand it is that amperage kills not volts and these things are designed to stay well below the amperage that can do damage and it's not a measure of body size either. But that said there are photos circulating the net of wildlife tangled up with bad results.
Someone more knowledgeable please school us on this.
yes basically it has to do with the resistance of the skin
skin doesn't conduct electricity great , it does better when wet , and even better if you can get under the outer layer
while a 9 volt battery doesn't feel like anything on your skin , it doesn't feel great on your wet tongue and we could kill you with an 9 volt battery IF we could set needles under the skin in just the right place think about how a pacemaker works install wires in the heart then shock it with a tiny charge from a battery that lasts years.
yes you can get burned by an eclectic fence , it will leave marks , if you are stuck in it for a time same as a stun gun
birds sit on hot wires all the time , they have no ground and very good skin and feathers for insulation.
birds sit on very very high current and high voltage lines all the time with no issue
squirrels run down power lines all the time , the issue is when they run across the top of the transformer and the voltage is high enough to over come the resistance and the current as well
our power company bumped line voltage a couple years ago , did something so it is still 120 a leg coming into the house
twice this year squirrel have made a bridge on the top of the transformer with their bodies by my drive way and taken out the fuse
they actually get 2 fuses the one for my transformer and the one down the street about 2 hundred yards that feeds my part of town.
they come put new fuses in and then we are fine till the next squirrel.
they go bang like a muzzle loader when they go , the fuse has a compound in it that when it fails it blows the element down the tube creating greater disconnect.
it cooks the fur off the belly of the squirrel from the 2 points the touched the transformer
I lived in this house 20 years without an issue and the guy from power who keeps comming out to put new fuses in said , yup they are having engineering look at options since they upped the voltage last year this has been more of an issue.
we use electrified poultry netting to keep chickens in and we don't kill chickens with the charger.
most of the time the juice for the poultry netting is just using a jumper off the pasture fence for the hot line that comes off a 100 mile charger in the machine shed.
step in posts and a spool of poly wire twine makes for very easy temporary running of hot lines they are about waste high but you could shove a few of those step in posts into a taller post.
there are also brutal photos of wildlife tangled up in regular old barb wire with no power at all , they do themselves in fighting it and and stress themselves to death similar to how 2 deer antler locked die stuck together
chargers are high voltage and extremely low current
some of those old HotShot chargers were higher current as well , that is what burned the weeds so well.
modern chargers are low current.