feel compassionate+to/about/for?
Which one is valid? Or none?
1. People have started to feel compassionate to animals and refused to use their furs for decoration.
2. People have started to feel compassionate about animals and refused to use their furs for decoration.
3. People have started to feel compassionate for animals and refused to use their furs for decoration.

Question

Answer

One can:
"feel compassion towards something"
"feel compassionately about something"
"feel compassion for something"

Timothy's answer above is incorrect, although he is American so American English rules may differ slightly. His example is correct.

Answer

While I can't really give you a good, technical reason for it, I can say that 2 is correct.

You could also say "People have started to feel compassion for animals..." if you prefer.