"It is a good bull."
Translation:Es un buen toro.
Several months later this came up again and I looked a bit deeper, and this is one of the things I found, with a buen/bueno example:
"Adjectives of appreciation: By placing an adjective before the noun, you can sometimes indicate a certain amount of appreciation for that quality and/or a certain amount of emphasis. In English we sometimes do the same thing by using a word such as "really" or by a change in intonation.
Examples: Es un músico bueno, he's a good musician; es un buen músico, he's a really good musician"
http://spanish.about.com/cs/grammar/a/whereadjective.htm about half-way down the page