Here is a small list:
The are loads more but that is a basic list.
maybe it's a black widow?
most dogs do
The liver fluke feeds off blood from different organisms such as dogs or people.
It is the marbled golden orb weaver.
That is the endangered Georgia Tube snake.
Not enough information. Provide all markings and details.
I do not think so. I have never heard of that kind of thing happening.
pythons have markings but the python is to hairy for any 1 to c the markings
Black Mondo grass is not poisonous to dogs. However, it is not a good idea to allow your dog to eat grass of any kind.
Are you saying that the snake has like a "hood" around the head? If so, that is a cobra.
This isn't much info and someone may expand on this anwser, but his spider might be reconized by the name of a Black and Yellow Argiope.
Dogs are not color blind, but they have a limited spectrum of colors that they can see.