90s mostly... it started in either 88 or 89... but ran for 11 seasons. They used to show it in the Sci fi channel over here, only seasons 8 and 9 that I know of. Teenaged me used to refuse to sleep... channel surfer in the wee small hours I stumbled on to it. Loved it straight off.
I don't do lamb watch. Mammal births are a lot ickier than chickens hatching.