"It must be the ram," she joked.
Wren and her husband Mike have had sheep for 23 years.
"Two years ago was the first time we'd ever seen quads. This current ewe usually has twins so we thought this pregnancy would be the same. When we woke to find four lambs it was definitely a surprise."
She said all four were fit and healthy, "all drinking and with full pukus".
Federated Farmers Rotorua Taupo president Alan Wills said a ewe having quads was "exceptional".
"Twins are pretty common, you'll occasionally get triplets but quads are almost unheard of.
"I have a dairy farm but we do have sheep as well and I've never seen quads, it's not normal at all. That's an exceptional ewe they have there."
Wills added that ewes only have two teats so "even with triplets there's a bit of a scuffle".