CHICAGO (CBS)– Chicago’s mild winter is having an impact on local cats.

Animal experts tell CBS 2 when the weather is warmer, more cats who aren’t spayed go into heat. That means a surge in the pet population.

READ MORE: South Shore Woman Sees Police Activity After Shooting Leaves Man Dead, Only To Find Out It Was Her Own Beloved Brother

Pumpkin is very young stray kitty who was brought in to Chicago’s Anti-Cruelty Society. She’s now being cared for by a foster parent volunteer.

Anti-Cruelty said it’s seen a surge in cats recently. Little ones need to be bottle-fed and cared for pretty much like newborns.

READ MORE: Chicago Weather: Patchy Frost Well Inland

Typically the kitten nursery fills up from mid-March until August. But with this early surge, there is a need for neo-nato fosters who have a lot of patience and time.

The Anti-Cruelty Society needs your help to care for these kittens.

MORE NEWS: Constituent Says She And Others Were Kicked Out Virtual Meeting With Embattled Ald. Jim Gardiner, And Alderman Isn't Providing Answers

It’s asking for bottles, baby food and donations.