The CGI puppy. The way the girl dog has a bow in her hair. The way the boy dog is a cutesy klutz.
The only sane response to this is projectile vomiting for the entire duration of the advert, with the puke flying forcibly our of mouth and nose, followed by an extended period of bleary-eyed moaning and gasping afterwards that follows any such emetic outburst.
Awful, awful, awful. And bonus turds for crimes against music: Little Things by Dave Berry in this case. Fairly twee, admittedly, but made into a non-lethal weapon through its association with these bile-inducing visuals.