Are CryptoKitties a NFT?

I'm curious about the recent trend of NFTs and have noticed that CryptoKitties seem to be mentioned frequently in this conversation. Could you clarify for me if CryptoKitties are indeed a form of Non-Fungible Tokens (NFTs)? I understand that NFTs are unique digital assets, but how does that apply to CryptoKitties specifically? Are they truly non-fungible in the same sense as other NFTs, such as digital art or collectibles? I'm interested in understanding the relationship between CryptoKitties and NFTs, and how this fits into the broader cryptocurrency and blockchain ecosystem.