Wow! I love this poem! The rhythm and rhyme fit the nature of the poem really well and the subjects of it are interesting and provoke different opinions.

I don't really understand the bit about the mother. Is it Mother Nature you are referring to? Clarification please.

I look forward to more of your work. 

I really love this. I'm not sure I know why. There's a lot hiding in the simplicity. I think being able to write sparingly and say a lot is a mark of talent. Did you revise this a good deal or did it all come at once?

The thing I love about this poem is its almost child-like rhyming quality. When I read it, it sounds so friendly, and yet it's totally morbid and slightly disturbing. I think it's a very fun poem, for all its talk about death. But... maybe that's just me?

I like this a lot; there's a lot hiding, as has been said, in the simplicity of your words and the stanzas themselves. Your rhyme scheme works really well here, and a few hiccups in the meter don't distract much from the overall work.

If it were me, I'd tack on an extra stanza. Four is round and feels complete, three requires more to tie it all together. That's what's really missing here -- something to tie the poem together and give us an idea of what you're getting at. An end that makes us read everything again in a new light. 

There isn't much to add after what everyone else said, but I just want to mention that the last line of your poem ("but there's blood beneath the ground") reminds me of a Bible passage where God tells Cain: "Your brother's blood cries to me from the ground" (Genesis 4:10). Had you heard this verse before writing the poem? Is the relationship intentional? It's definitely a strong image which makes for a good last line.

Great poem!