When one Houston couple gave their son a puppy named Buttercup for his birthday two years ago, they were happy the husky-boxer mix made a great cuddly companion. The only problem? Buttercup’s strength outweighed his delicate-sounding name.
“Whenever we brought ‘Cup Cup’ to the park or tried to walk him, it was just so hard because the husky in him is so strong, so he can pull us,” said Tez Reventar, 41. So instead of going to the dog park, the Reventars let Cup Cup roam their…