Hi, my dog doesn't seems to be active anymore. He used to play a lot, but just isn't active anymore. He's suffering from cold from 3 months, I took him to vet several times, he diagnosed it but didn't get it any better.The vet advised to wait till summer so it would just go away. But one day, he spitted blood from his mouth. And from that day, he isn't active anymore, he just lies down, sleeps and eats normal. He doesn't really wags his tail much either.