DKitten was neutered last week and has spent a little time in the garden since.
He's getting braver and will soon want to roam.
He's been microchipped but I'm worried that without collar he may look like a stray and someone may take him in.
He's very, very friendly (all over strangers who come into the house) and I'm concerned he'll happily wander into another house.
Can you tell I'm anxious about letting him out? 
I spoke to the veterinary nurse, who said there's pros and cons to collars - we would get a snap release one, but I understand these still carry a risk.