Well, I think horse poo and urine is probably not good to touch or soak your feet in, but you won't get tetanus from it. e coli, more likely ;~D
Or were the boots to protect you from stepping on something and getting tetanus? I think the risk of tetanus is anywhere there are sharp rusty objects, not particularly associated with being around horses.
Yeah, the bowel has germs. I think he meant that horses pee all over the place and I could step on something that had been peed on. Too me, if you have a horse with bacteria in the urine you have a sick horse though. I had not read anything about this but thought maybe it was something that I missed.
I ask because I'm putting a 1st aid kit together. I was mad at myself today because I didn't even have anything to clean Sarah Lee with.