I want to find a book about a capybara.

I'm looking for a book that's probably for children or young adults. I'll try to describe it as best as I can... the characters were animals. The protagonist was a capybara or another very similar animal. His neighbor or friend was a wild boar. The story ends with Mr. Capybara falling into a hole because he was startled by the noise made by the wild boar. The animals are anthropomorphic; they wear clothes, walk, and talk like people. I read it when I was a child and I don't remember the title or the author.