I'm not going to flush my half dead fish
Why don't you want to flush your half dead fish down the toilet?
I think all living things should not be flushed
I respect that you do not want to flush your half dead fish down the toilet. You should be kind and take care of your pets even when they are very sick.
I'm not sure if I want to take care of it though.
You signed up for caring for that animal so it is your duty to care for it until the end of its life.