"...including an old sailor's myth that cats have sway over the weather. Feline meteorological magic, coupled with a symbolic association of storms with dogs, may be the genesis for the phrase."
" ....On account of the notorious inefficiency of 17th-century sewage and drainage systems, the streets of European cities were often littered with debris and dead animals after heavy rainstorms."
"It could liken the racket made by a storm to the thunderous noise made by fighting cats and dogs. Or, it may arise from the era of thatched roofs when downpours would bring cats and dogs dozing atop houses down onto the occupants."
"The leading theory seems to be that animals have been associated with weather for centuries. Cats stand for rain, and dogs for wind."
Ah, the wonders of Google...
As for the topic question, first beer at 12, then whisky and vodka around 15.