Hi Jennifer and welcome. I do not have any poms,however I have been told the same thing about any small dog by my vet.I do NOT use the Lepto as all of my babies are of the toy variety.I don't know about where you are,but here in Missouri Lepto is very rare and not even considered a threat.So therefore I don't risk using it.I have had small poms in the past,be sure and watch for sugar shock if she is a tiny one.If you have any further questions just ask.I will be glad to help any way I can....Sandy