Hi I know this post is old but I have been using 2 things for years one more than the other and they both are fantastic items. Comfortis and Nexguard. My 12 year old cocker spaniel used it her whole life, along with my 19 year old manx/snow foot cat, and my new dogo argintino. I have noticed it had helped even with chiggers due to high grass in some parts of our yard on our dogo. which is great. Neeva (Neevay) my dogo is on Nexguard and it has been amazing. not one issue at all. I pay around $25 a pill the last 35 days. On 1800petmeds theres a 3pk for around $60. hope this helps.
