What a great idea! I like to bring Jackson to my uncle's house, but his fenced in yard is that wrought iron type and he can squeeze through in certain parts of it (where storms have messed up the iron, and whatnot) so I'm always a nervous wreck watching him like a hawk when we visit.
In the summer, I leave Jackson's lifejacket on most of the day, and last summer, I left the lifejacket on while over at my uncles because it prevented him from slipping through any cracks. It's a similar concept... and the lifejacket is more "constricting" than these bumpers, but he has NO problem running at full-speed while wearing it, or jumping in the air to catch a ball. Doesn't bother him at all. And not to mention, a lifejacket by a pool is, again, another safety feature to prevent him from falling in and drowning (even though he is a great swimmer, you never know). I am ALL for letting a dog be a dog (as most of you know! Jackson is about as much 'dog' as you can get
) but safety is important too.