This spring Seattle green thumbs will be unable to get their hands on the Woodland Park Zoo’s spring zoo doo compost.

As a conservation organization, Woodland Park Zoo is committed to being a steward of the environment and provides 100 percent recycled product to the public, said zoo spokesperson Gigi Allianic.

However, herbicide clopyralid was detected in the supply of zoo doo this year under its regular testing procedures and the levels were unacceptable.

“While it does not pose a risk to our animals it potentially is harmful to some plants that are vulnerable to it,” Allianic said.

Since then the zoo has made a change to use organic certified feed for their animals.

“We haven’t heard from the public yet since this news just came out, but because this is usually when our spring fecal fest is, it will be disappointing to those folks who commonly use it,” she said.

Zoo doo will be available again in the fall and two gallon buckets and pint sized containers are still available at the zoo store.