I have a 19 month old male GSD and I would like to start walking him. I have a fenced in yard and play catch several times a day with him but he is completely addicted to playing with his tennis balls. It is never enough so I want to start walking him too. I need to burn some of that energy because my wrists and hands are cramping up playing so many times a day with him. I live in a wooded area and everytime I take him out of the fenced parameter he gets ticks. I use Advantage so fleas aren't a problem. I spray him down with flea and tick spray and he still gets them outside of the fence. I looked into frontline plus but lots of reviewers state that it does not work. I am very interested in Advantix since it kills fleas,ticks and helps prevent them from attaching. I read some reviews though and some say it caused seizures and severe itching. Has anyone had these kinds of problems? Can anyone suggest a good flea and tick preventive? He does stay in the house with cats but they don't love all over him because I know some products you can't have around cats. Any suggestion would be helpful!