This is not a healthy bird. He is sick and hurt. He needs to go to the vet. He is seriously ill if he had blood in his stool. He needs to be seen by a vet right away.

Llévalo ya al veterinario

My bird was just fine when I took him,but after a while sth rised over his arm(I think that are his feathers which have been joined together by his blood cuz he might have scratched it ).After a while it fell down, but know it is creating again at the same wing.This "sth" gets out from his body and that's why I think that are just feathers.I saw even red color in his feces but not anymore.He doesn't sing(just sometimes),but I don't know if the canary is a male or a female(I think it's a male but not sure).However I would appreciate it if you wuould give me an answer.Thank you!