mine are on it during heartworm season i think it is the spring/summer that they are on it for? i'm not sure. maybe someone more experienced would know, but my yorkie was on it for a number of months. there was also a flea preventative med, too, although he still got fleas last summer!!!! i plan to put both on soon...
__________________ Charlie's mom  - Charlie February 15th 2003 - September 12th 2007. Gone too soon. We will miss you always. |