The dog

I saw a dog just now. It was bleeding.
It was still alive, and sniffing around for something to eat on the side of the road.A golden labrador, just like the one I have at home.

It was wounded on its side. Pretty badly. Lots of blood.
I didn't know what to do. Help it? What could I have done?
I didn't touch it because I didn't want to get blood all over me,
so I just walked past.

Now, thinking back. The question is,
when would there be more blood on my hands?
If I touched it? or if I didn't?