100% Natural Cocoa Mulch Toxic to Pets

Cocoa bean shells, a by-product of chocolate production, are sold as mulch for landscaping. Homeowners find cocoa mulch desirable because it degrades into an organic fertilizer and provides an attractive color and odor. Unprocessed beans, derived from the Theobroma cacao plant, contain 1-4% theobromine/0.07-0.36% caffeine whereas, cocoa bean mulch contains 0.19%-2.98% theobromine. Some dogs find the mulch attractive and eat small to large quantities. …

Dogs consuming cocoa bean mulch may develop methylxanthine toxicosis. Retrospective case data suggests clinical signs following ingestion include vomiting and muscle tremors. Although oral doses could not be quantitatively determined, clinical severity increased with increasing qualitative dose descriptions. Therefore, treatment should be directed at controlling clinical signs until recovery and preventing further exposure. Pet owners should avoid use of cocoa bean mulch in landscaping around dogs with indiscriminate eating habits.

from ASPCA.org

According to tables we’ve examined, cocoa mulch contains 300-1200 mg. of theobromine per ounce, making cocoa mulch one of the strongest concentrations of theobromine your pet will encounter in any chocolate product. Yet the question of the gravity of the risk presented by this type of gardening mulch remains a matter of debate. According to Hershey’s, “It is true that studies have shown that 50% of the dogs that eat Cocoa Mulch can suffer physical harm to a variety of degrees (depending on each individual dog). However, 98% of all dogs won’t eat it.”

Rather than gamble their dogs won’t be attracted to the mulch, responsible pet owners will probably prefer to choose another form of soil enhancement for their gardens.

from Snopes.com