How do you know if your finch's are sick?

Question

i just got a finch and i wanted to know how do you know it of sick.(a fich is a bird)

Answer 1

if it tells you its sick

Answer 2

You have to know your bird VERY WELL. Birds, in the wild, are eaten when their predators find that they're sick, so they have to disguise it well. So now you have to look for the slightest change in behavior, eating and drinking patterns, and energy.