Putting An Animal Down

Yes, I had a cat that lived to be 23 human years. She was very mentally challenged. She got so old that she was partially blind and deaf and kept falling into the pool and we had to get her out. One night, she fell in and had to tread water all night to survive. My dad did get her out in the morning, but she was so exhausted that she couldn't walk. We found it best to put her out of her misery.