lots of information here,,definitly not worth the risk.
http://www.thenakedscientists.com/forum/index.php?topic=2004
"Avocados contain a toxic
component called persin," explains Jill A. Richardson, DVM, of the ASPCA Animal
Poison Control Center (APCC), "which has been shown to produce cardiac tissue
damage, respiratory distress and mammary gland damage in a variety of
animals--including horses, goats, sheep, dogs, cattle, rabbits, fish and
birds."
Also i remember when my wife was preganant was told avacado was to be avoided and wasnt good for women breast feeding