Yes, Isofluorine(sp?) is the one! My Vet hasn't lost a Pyr yet! :-) Still better to err on the side of caution and start with less and add to it if the dog is not completely out. Barb Bowes, NJ down at the shore! Bo, Molly, Chelsea & Flopsy the Pyr Shep The more people I meet, the more I like my dog! bamb@monmouth.com