I've adopted a stray, clawed, neutered male cat from animal control 3 weeks ago. The vet approximated his age at 4 years. So far he has adjusted well to my home, but he plays aggressively. He'll grab hold of my forearm with his claws and bite my hand and wrist while simultaneously kicking my forearm with his back legs. If I try to break free he gets more intense. He purrs throughout though, which makes me think he's playing, but his eyes are dilated and his ears are back and flat.
Since he was picked up as a stray, I'm worried about him running away and not coming home. Whenever the door opens he tries earnestly to get out. Luckily my condo is in a secure building so he doesn't get far, and he always lets me pick him up and bring him back inside without a struggle. I'm not opposed to having him be an outside cat, I just don't know if I can trust him.