“Guinea pig to become father to 400 after breaking into female enclosure”
"Staff at Hatton Country World in Warwickshire couldn’t understand why they suddenly had 100 pregnant guinea pigs on their hands - until they released one of the male rodents had managed to escape his enclosure and infiltrate the female-only enclosure.
They noticed that the exhausted father-to-be, now nicknamed Randy, had lost a little weight, but did not realise why until they discovered he was actually a male rodent being kept busy in the wrong pen."
That’s a lot of “cushion for the pushin”.