HDM-
I am so impressed with all of your knowledge! Thanks for always helping! I have been given trifexis, but the last time I gave it to shadow, he threw up 🙁 I have been trying to find natural products. I looked at the ones you listed above, and they seem like a great alternative to conventional preventatives. I have also found another natural flea-prevention: http://leerburg.com/82.htm if you would like to take a look at it and tell me what you think, that would be great! I think I will definintly try the sentry for sure!
