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WhyAmIEven
Since: Sep, 2017
lordofthestars
Since: Sep, 2014
2017-10-30 12:38:48
I am literally 999999999 percent sure I'm DEAD WRONG here, but the only thing I can think of that involves a warren of rabbits having to move because of human construction is Watership Down, but I don't think it includes much of the stuff you're describing. Hope you do find it, and sorry if I wasn't any help!
WhyAmIEven
Since: Sep, 2017

When I was a kid I read a book from the local library, and I haven’t been able to remember the name of the book for years and it’s really bugging me. So in the book, two warrens of rabbits? live in a Valley which gets flooded to make a reservoir? The ‘good’ warren prepared for it and built a boat, but the ‘bad’ warren just lay around, and ended up getting rescued by the good warren when the valley floods. The ‘grandmothers’ of the two warrens end up becoming friends. Two kids on the shore of the new reservoir see the little boat and I think they threw a stick at it, but they ended up getting shrunk and stuck on the boat. The boat ends up in a parallel world where the valley isn’t flooded, but the two kids are sad because they are stuck in a parallel world and can’t get home. I think they do manage to get home at the end.