NBC 10 Medical Reporter Cherie Bank has reported that there has been an overpopulation of kittens at local area animal shelters and now an animal group might have determined what is contributing to the kitten overflow.

The group called Pets Across America said they believe that global warming has extended the cat-breeding season beyond spring, which is the usual time for the kitten boom.

But the global warming trend means cats are in heat more, according to the animal experts.

People from the Philadelphia Animal Welfare Society or PAWS said they are in their fourth kitten season just this summer.

PAWS is extending its cat "dollar days" promotion until the end of September. The fee to adopt a cat is only $1.

If you are unsure of permanently adopting, you could foster a kitten while it waits for a permanent home. It helps alleviate shelter overcrowding and lowers the rate of animals that have to be put down.

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