R generally doesn't mind boots too much, as long as he's doing something fun while he wears them. But, he doesn't like them when he's not distracted by something as fun as running - as you can see in the next photo.
Through it all, Shyla's paw pads were fine. She thanked her lucky stars for that because she abhors boots. In fact, she sometimes goes "on strike" and refuses to run if she's wearing boots. She's a barefoot kind of dog!