My wife and adopted a 7 year old guy from BRAT this past December and he does the same thing. He's a retired puppy mill stud that never learned how to climb stairs until he was "freed." If he gets a running start, he can leap a step or two, but if he walks up to steps, he goes up backwards, just like in the video. He also has a phobia with certain door thresholds. But don't worry. He's a super fun little guy who just has a few little quirks. He can outrun his 12 year old B-sister in the yard, but she always beats him up the stairs.
flying Basenji
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So it may be with luggage, but pressurized and climate control. It did worry me that it could drop ti 41C, but that's rare.
EDIT: " Passengers flying on our Boeing 787 aircraft, please note: The temperature in the cargo hold can drop to 5 degrees Centigrade. "
I meant 41 F, which is 5C. But I didn't fly on 787 so moot point anyway.