Water shrews have venomous saliva, but cannot puncure the skin of large mammals, like humans. Watch out for water shrews!!!
Yes, shrews do eat plants occasionally, but not all the time they mostly eat Invertabrates, however, they can also eat vertebrates like snakes, salamanders, and mice.
Shrews are mammals - that means they give birth to live young, not lay eggs.
Yes, it is a mammal. The shrew bears live young and suckles them - characteristics of mammals.