First, it tells a creation story from a rabbit’s point of veiw. It’s compatible with Genisis, and the first rabbit has some amusing similarity to the biblical patriarchs. He’s given his long ears and short tail as a result of being naughty, and these things are both a curse and a blessing [good message about differences there]. But rabbits are the entire point of creation, in the rabbits point of veiw.
Second, when one of the rabbits is praying for divine intervention to save his brother, offering his own life in exchange, the writer makes a statement along the lines of ‘all things are as they must be, God makes no bargains’-- it seems to be against intercessory prayer, though the petition is granted.
Third, one of the rabbits [Fiver] is psychic. Shouldn’t be an issue, but could be for some people.
Lastly, though this is a classic of modern fantasy, a must read for anyone with any openness to the genre, it ain’t no kiddie book: there’s a surprising amount of violence, and ‘breeding rights’ are mentioned frankly. Nothing pornographic of course, but not for every 9 yr. old, either.