Update: we are getting stronger and stronger. Hopefully it stays this way. He was born on June 21, 1997, so he has some decent mileage already. Well, he started to ignore all the home cooked meals so I decided to go and buy him can food. Bought a bunch of Cesars and he seems to be enjoying them although he has runny stool. But that I guess may be also because his body is not used to cans. I am afraid to put him on one day starvation at this point so I guess I will patiently wait a week or two so his body gets a chance to adapt and get stronger and meanwhile wipe his little ass
I am so happy he did not leave me and even happier I did not put him asleep. Thanks God for the right decision folks. His appetite is back to normal (maybe even stronger thanks to the gourmet can food) and he also drinks normally. Any suggestion about the diarrhea solution will be welcomed. Have a good day everyone.