I lost two pets in a matter of one month about three years ago. One was a cat named Chloe that was my wife's pet. This animal absolutely adored my wife and wouldn't let her get out of sight. When my wife wasn't home she would hide until she got home. She was just a sweet animal.
Anyway, she had cancer in her jawline and we had tried removing the growths, but had been told they would grow back, which they did. Eventually, I could tell that the animal was in pain and told my wife it was time. We took her to the vet and petted her while she was administered the drug cocktail that put her down. It was hard, especially so for my wife, but we were sort of prepared for it.
Two weeks later our thirteen year old black cat, Rover, started acting ill. I took him to the vet for a checkup and found out that he had cancer of the liver. Nothing could be done. We administered IV's to him to keep him hydrated, but it wasn't too long before it was time for him to take that last ride to the vet's office as well. I cried over that cat like a damn baby. I have had many cats and dogs in my life, some more intelligent than others, but I have never had a cat as intelligent as this one was. Without exaggeration, I can honestly say he understood at least twenty different phrases and words and would react to each of them. He was just one cool cat and I miss him to this day.
I just don't have it in me to be able to do what this man did. I understand him. I just couldn't do it myself.