Rod Speed wrote:

[snip]

I favour a sort of cyborg-mower: it ambles around the grass by itself
after the manner of a sheep, but programmed to avoid the flower beds;
then at night it parks itself over a drain and quietly defecates into
the sewer system where its faeces (along with waste from human
sources) are converted to methane to be stored for useful purposes.

It ought to be possible to genetically engineer cattle in much the
same way - it would save the farmers a lot of work. One can
toilet-train dogs, so why not cattle?

Different brains.

genetically engineer

--
Graham J