Sheep numbers in New Zealand have dropped 2.3 per cent over the past year to 26.21 million - a far cry from the 57.85 million recorded in 1990.
Beef + Lamb New Zealand's annual stock number survey estimated this spring's lamb crop would be 4.2 per cent lower - or 980,000 head down - compared with spring 2019, while adverse weather events could lessen that further.
Ewe condition during mating was poor to average due to lower overall feed availability while ewe pregnancy scanning results were 5 per cent -10 per cent lower due to dry conditions and feed shortages. Fewer ewe hoggets were also mated.
In a statement, B+LNZ Economic Service chief economist Andrew Burtt said drought meant farmers decided to have fewer hoggets, weaner cattle and cows mated which would have impacts on future stock numbers.
"The impact of the combined decisions to destock younger animals this year will be fewer stock in future years. Capital breeding stock may have been retained this year but the effects of the disruption in 2019-20 will be felt for at least a couple of years.