pennyroyal mint - toxic for dogs? horses?

[CCC/thrbrdrider]

I understand that Pennyroyal Mint is an ideal repellant for fleas, flies and ants.

However, it's slightly toxic, and dogs do nibble on grasses. Any info as to whether it's harmful for dogs? Particularly a small breed - Chihuahuas. Or would it not be enticing to them?

I also have horses - any info on that?

Thanks.

[Nadine]

Yes, pennyroyal can be toxic to dogs.
Informative links:

http://www.dirtdoctor.com/forum/viewtopic.php?t=1733

http://www.canadogs.com/Toxic_Plants.htm

http://www.flowerlinks.net/link_directory/poisonous_house_plant.html

http://www.akca.org/library/poison.htm