I have body, a mouth, a lip, and a neck. I'm a good pitcher if I'm handled with respect. Replace 'p' with my first letter I'm a stout little dog. Replace 'b' with my first letter I skitter under a log.

Left behind, but always follow. I’m the void, you leave me hollow. In the mud I often wallow, And vanish in the beachy shallows.

In summer's sun, I wear a thick armor, inside I hold a sweet, juicy treasure. Slice me open for a refreshing delight, a cool escape from the heat's tight grip.

Floating symbol of peace, pure as a cloud, carrying olive branches from the heavens aloud.

Add a k and I'm a clown, remove the y, and I am a noun. I have no breath, but I bleed red, my color changes in a threesome with two other elemental variables. What happens to nails, the adjective, that can cause tetanus if you step on one, afflicted with this?