See if your father can eat a small amount of honey and sesame oil (first, the taste, second, the physical condition is limited). You can slowly rub a little honey or sesame oil and powder into a big ball, and then break it into small balls bit by bit, just like buying pills, which is very convenient.

You can do it while watching TV. Put it in the refrigerator.

By the way, put it in a flat plate when you have just finished eating, cool it in the refrigerator, and put it in a bottle when it is dry.

My family used to buy pure spirulina powder to eat like this.

For reference, I hope your father will recover soon!