So you've been supplementing the hay with some beans, hmm?
Actually, cows do produce "gas" as well as milk. What we would need would be a multiple purpose udder -- milk, low-fat milk, regular gas, and high test.
Cows would become a lot more popular.
Did you know that they've bred goats that produce spider silk in their goat milk? My weird ideas are not quite as strange as some may think.
The spider goat is a DNA spicing experiment. 8 legged goats are weird looking though.
But I don't want spider silk in my goat milk!