Hi Helen It is not good English. The dog could ruin the clothes, or the dog could tear the clothes, or the dog could make holes in the clothes. But we don't say "break the clothes". The word "break' is usually used for things that are rigid. You can break a glass, or break a window, because these are rigid. But clothes are soft and flexible, so you wouldn't break them.

No . A /the dog damaged or ripped new clothes.