The Animal Rescue League of Berks County is asking for help.
Julie Reber, the organization's foster program coordinator, said summer is cat-breeding season.
"A cat basically has a litter every two months or so, and a litter can be multiple amounts of kittens," said Reber.
Since spring, the organization has taken in around 500 cats. Just this week, the organization got a larger-than-average number of cats, which were surrendered.
"Typically, anywhere from eight to 13 cats come in our stray building overnight while we are closed. [Thursday] morning, when we came in, there were 25," Reber said.
According to Reber, there are about 350 cats in the shelter right now, and another 120 are in the foster program.
ARL representatives said they are hoping the community can pitch in and donate supplies. Their wish list includes cat litter, cleaning supplies, and laundry detergent.
ARL officials said the overall message is simple -- spay and neuter your pets.
"There would be a lot less cats that are sitting here waiting for home," Reber told 69 News. "A lot less cats in our stray building, of course, that we come to every day."
Reber added that No Nonsense Neutering offers low-cost spay and neuter services for feral cats.
For those who are willing to go beyond donating supplies, the ARL is having an adoption special.
"We're doing kittens for $25, and that does include a spay and neuter when they are big enough to be spayed and neutered," explained Reber, "and we have $5 adult cats, as well."
Reber said there is also a foster program.