Today I found some holes in my shed and we keep all of our animals in our shed. I have a large shed that is divided by wire and wood. One side has two plastic cages, one with rats in it and the other with hamsters in it, also on this side I have four bunnies and two very young chicks that aren't quite old enough to free range yet. On the other side I have chickens and ducks of various ages. I found two decently large holes in floor of my shed today and they were clearly made by rats but do I really need to be concerned? My boyfriend had a rat problem when he had chickens but no chickens were ever harmed and our neighbor also has had problems with them but no deaths or injuries. I was just curious about what could happen, so here are my questions: 1.I live in Newfoundland, does that mean rats here are different or are they all pretty much the same? 2.We have had our animals out there for several months and there hasnt been any sign of rats until now, is there a reason why? 3.Would they chew through the plastic cages to get my hamsters or rats? 4.Would rats kill large chickens and ducks or just the smaller ones? 5.Would rats kill bunnies? Thank-you. Any info would be great.