Plural of zoo in Japanese

How would one pluralize the word "zoo" in Japanese? Example: "All the zoos in the country are closed to for BEARack Obama's birthday."

You know there's a Japanese question thread right?

Also, there is no plural in Japanese. You just specify "all".
It would be 日本のすべての動物園は（rest of your shit)。
But you really can just say 日本の動物園は(insert the rest of your sentence). and people will take it to mean that you're talking about all of the zoos there.