Sending prayers and vines for lovely Raja. Here is the recipe for the Liver Shake, which can be used temporarily as a complete diet for cats who are doing poorly. Most cats seem to like it, even ones who won't eat anything else. You could also try bone broth.
THE '~LIVER SHAKE~' FOR SICK CATS
This liquid food is appropriate for cats suffering from conditions where they are eating very little or not at all such as anemias, leukemias, deficiency states with symptoms of lethargy, listlessness, and weakness.
1 cup RAW LIVER (BEEF, or CHICKEN)
1 cup FRESH CARROT JUICE or V-8, or Tomatoe Juice
1/4 cup *FRESH FILTERED WATER
1 RAW EGG YOLK
1 tsp.KELP POWDER OR SPIRULINA
COMBINE AND MIX IN A BLENDER UNTIL LIQUEFIED. (Note: it will be frothy)
Dosage:
Administer 10cc daily 3-6 times a day. (6Occ per day max)
Some cats will need to be force-fed with a syringe, while others will drink it out of a bowl.
This food has a sweet and salty taste, and the energetic properties of tonifying (energy boosting), warming and stimulating and supports the kidneys, spleen, liver and stomach.
This drink is a complete dinner for a sick cat until they feel good enough to eat by themselves again.
*Substitute rice water if the cat has diarrhea. Rice water
is made by boiling white rice (2 Tbsp) with water (1cup) for 30 minutes.
This liquid aids digestion and assimilation and inhibits the symptoms of diarrhea.
May I ask why dental surgery is not an option for him? I thought it wasn't an option for my 20-year-old, because of his elderly years, but he just had massive dental surgery to remove all his teeth and the roots, and he is doing great.
ETA: Antibiotics can also upset the stomach, and could be contributing to his lack of eating.