Yes, It's a Lovely Day, Sort of

It's a beautiful day, so at around 4:30 this afternoon I went outside to have a little walk. However, I was greeted by an unpleasant pile of dog excrement in my front yard and had to clean that up. I do not know what to do about that. It's certainly not the first time.

Any suggestions?

I thought about posting a sign out there:  

PLEASE DO NOT LET YOUR DOG 

USE MY LAWN AS HIS TOILET. 

IF I SEE HIM, I WILL SHOOT HIM. 

OR HER. 

Of course, I won't do that. And, of course, I don't own a gun.

I was also greeted by the snake who lives here and could not--again--manage to send it flying somewhere. (I didn't have my broom with which to sweep it away.) Here is my question: Can snakes hear? I don't see any ears, but that snake hears me coming. Ground vibrations?

I do not like sharing my home with snakes. When the thing has babies what shall I do? Help!

P.S. Later in the evening I discovered, near my front door, the empty snake skin "my" snake had wriggled out of and discarded. Does that mean he's getting bigger? Truly, I do not like this.