I realize that some may enjoy the song and find it hilarious, and that's their perogative, but I just don't see anything funny about the following scenario:

Family has a beloved cat that is allowed to roam a little while in the garden every evening before bedtime. Usually he comes to the door in a half hour or so and wants to be let in, but one evening he doesn't come back. They search for him and call him, and go to bed worried sick, but hoping he'll turn up in the morning. Instead, the little girl goes out to catch the schoolbus and finds him dead on the road in front of their house. The furry affectionate fellow that they loved is now "six pounds of raw minced meat that don't smell very nice...red, squashed and soggy" and they can imagine him dying with a "despairing meow and a sort of squelchy splat..." Ha ha, isn't it funny to see the little girl weeping over the cat that she'd enjoyed stroking and petting, the one who loved to play hide and seek with a shopping bag or jump for a ball of yarn. Doesn't it just make you split your sides laughing to imagine that cat "slightly dead and very flat". Yes I know these things happen, pets get hit by cars and we've all seen things like that at the side of the road. A couple of years ago the car in front of me hit a dog and kept going. I stayed with the animal helplessly for a few minutes while she convulsed and mercifully died. I don't think she felt anything beyond the initial impact.

Somehow I don't think I would write a 'humorous' song about that.

As I said, Eric Bogle has written some great songs. Personally I really don't like this one.