@ Stephen S
You have to use caution with seniors (dogs over the age of 7), they are more sensitive to pesticides (that is what flea/tick preventives are).
What you describe sounds neurological…I would proceed with caution. I use nothing on my 15 year old dog, I just check him every night for ticks and bathe him once or twice a week.
Consider a Preventic collar, supposedly good for 3 months, 1 month is more like it.
Or a topical like Advantix II. I sometimes use both in conjunction with my younger dogs. I would not consider an oral. I also make an effort to keep them out of tall grass and woods, I keep the lawn mowed low.
Of course, I do heartworm preventives every 6 weeks (more pesticides) and have them tested once a year.
