New to chickens and after losing one of our 4 pullets to a raccoon we've added an electric fence around the coop. I'm hoping we've got it pretty much there now but I still have a few things I'm unsure about and would love it if anyone has some thoughts/answers... First, there are 4 wires to the fence and it's approx. 21 inches high with the bottom wire around 4-5 inches from the ground. I'm wondering if that should be high enough for any predator that might come along (raccoon, possum, bobcat, coyote, dog)? Next I'm concerned about some small trees nearby. Should I be worried about something climbing and then jumping from a tree, over the fence and into the coop? I'll add some pics below of the set up - if anyone has any other thoughts to offer it would be appreciated - thanks!