The Rotorua SPCA has been "flat out" over the holiday period, with the kitten season in full swing.
SPCA shelter manager Karen Rolfe said they always had a lot of animals coming in at this time of year, with stray cats and kittens.
It was kitten season, so the first lot had come in, but cats would be getting pregnant again and the centre would be "well and truly" full until after March, she said.
Ms Rolfe said cats could have three lots of kittens in a season.
She said the SPCA was always in need of more volunteers and had plenty of kittens to home.