Be Careful Of Cocoa Mulch......

Cocoa Mulch is manufactured by Hershey's, and
they claim that "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."

Snopes.com site gives the following information:
http://www.snopes.com/critters/crusader/cocoamulch.asp

Cocoa Mulch, which is sold by Home Depot,
Foreman's Garden Supply and other garden supply stores contains a lethal
ingredient called 'Theobromine'. It is lethal to dogs and cats. It smells like
chocolate and it really attracts dogs. They will ingest this stuff and die.
Several deaths already occurred in the last 2-3 weeks.

Theobromine is in all chocolate, especially dark
or baker's chocolate which is toxic to dogs. Cocoa bean shells contain
potentially toxic quantities of theobromine, a xanthine compound similar in
effects to caffeine and theophylline. A dog that ingested a lethal quantity of
garden mulch made from cacao bean shells developed severe convulsions and died
17 hours later. Analysis of the stomach contents and the ingested cacao bean
shells revealed the presence of lethal amounts of theobromine.