We have found shrews in my house 2 of them so far , first thinking it was a Mole, I came to discover it's a short tailed shrew witch is the one venomous mammal small like a mouse. Reading on it, it says it can kill mice and such. I am a newbie to having piggies so thought I'd ask more seasoned owners. If they have heard of this?, or are Guinea pigs to big?, am I working for no reason?.