OP here, I had only had the two budgies for a month, I bought them with their wings clipped but I didn't think he could fly with two inches missing from his wings, especially since he and the other budgie hadn't been doing so well. They couldn't get any lift on any of their attempts, and could only fly about 5 feet or so, so I was fine letting them sit at my window. That;s all they had been doing in the past 2 weeks I'd been letting them out. I was just sitting here, and suddenly I hear my mum screaming- they had somehow flown over the gate and into the living room. Another thing to note is that they had made a lot of noise every other time they flew, but this time I didn't hear them fly at all... I was letting their wings grow out so exactly this couldn't happen. They hadn't been able to fly far enough to get over the gate before, having nothing to jump off and being unable to gain lift. I wanted them to be able to fly away from my mums dog if they got out. Sadly, they tried to fly out the glass door after going out my door and the one the dog got was the same colour as his fluffy toys... I do understand this is at least partially my fault, if not all my fault, I was right here and didn't hear them fly, let alone get over the gate that stops the dog coming in here. I was too focused on what I was doing on my computer at the time.