My kitten (adopted as a stray, we've had him for about a week now) passed a small amount of blood in his stools when he pooped today, and his back twitches when he poops, he's still playful but he doesn't like it when I hold his bottom, d you know what could be wrong with him? My parents planned to take him to the vet soonish ( a week or so) do you think my kitten can wait until then, or do we need to take him sooner?

He hasn't had an exam or shots yet? It could be many things. I always take my new animals to the vet right away so I know if they need any treatment. Ask your parents if you can go sooner.

The kitten is in obvious pain. I wouldn't wait a week to find out why. Not doing it immediately is just cruel.