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Unless you count naked dogs as nudity, there is none. It is strongly suggested that one of the dogs' owners are homosexual.
Some mean boys throw rocks at Hubble. Owen then knocks both boys down to make them stop, but one then pins Owen to the ground. He stops when Hubble and the other dogs growl at him.
At least 1 use of "Oh my God."
A canister of gas is knocked over and the escaping gas causes the dogs to laugh and act rather high (we see the distorted point of view of one of them).
There's a brief reference to euthanasia for Hubble (since he's a dog with a "bad attitude") and Owen briefly makes a concerned comment about him being put to sleep, but that's it regarding such material.
