<human>: Can you provide a brief overview of the text?

R/cats seems like its entirely pictures of cats, whereas this seems to have advice, so apologies in advance if this is the wrong place to post.

I adopted an alley cat that I found at a bar about a year & a half ago. He was young, but not a kitten. We kept him inside for about a year, but he would run outside sometimes, & just was generally unhappy. So I started letting him out. I lived in an area with tons of stray cats, so there was a bit of territorial scuffling at first. But Cousteau lost some patches of hair, but that was really as bad as it got.

A month ago, I moved into a new place. With a common, fenced backyard. There is a dog & a pig that live in the yard, but no cats, and a couple dogs (& roosters) next door. There are stray cats here as well, but not as many. 

I started letting Cousteau out about three days ago, because I could tell the balcony wasn't satisfying him. This morning, I come home from work, let him in & notice blood on the back of his ear. I cleaned it, & it's not bad, but it worries me. 

He's so visibly unhappy when he's indoors all the time, but I don't want him getting hurt. Is there anything I can do?
<bot>: Rescued an alley cat, he hates to be stuck indoors all the time, but seems to fight with anything he can find. What can I do?