Kay wrote:
[...]
I asked this question on urg a while back, and someone suggested
that
cooked is tenderer so more calories for less effort, which I
suppose
is a possibility. And someone else that most meat on compost heaps
has been cooked, so that's where the association came from.

The latter was perhaps me, no doubt among others. The only way the
advice can be analysed to make everyday sense is as a clumsy way of
saying "left-over food, including meat or fish, as opposed to
vegetable trimmings and the like". The idea is of the washer-up just
scraping everything left on a plate or in a pan into the compost, and
that's likely to include bits of meat or gristle or bones. Few
families can often throw away much raw meat, so to that extent it's
comprehensible.

As composting advice, though, the consensus seems to be that it
doesn't make a lot of sense even when it's interpreted that way. I
still have a lingering doubt, but those arguments have been
persuasive. I'm sure people have different experiences: gardening's
like that.

--
Mike.