Ceftriaxone is a pretty heavy duty antibiotic for a new infection, not to mention the risk of infection from the PICC line and gall bladder diseases. I'd go the oral Doxy route first, for at least 6 weeks, maybe 3 months (for humans, that is).
Guin, I figure the more thumbs down I get the better. You can't please everyone
"We can judge the heart of a man by his treatment of animals." ~Immanuel Kant
@Wendy, perhaps I just got brain washed working in a clinic, but I was under the impression that the OTC stuff just doesn't work as well as the prescription stuff.
I'm not opposed to trying anything at this point. Found one on my lab yesterday...it was a deer tick and it looks like it had been there for a bit. They're freaking impossible to see when they're small and you've got a black dog in front of you. Grossness.
A good horseman doesn't have to tell anyone...the horse already knows.
We still have good luck with Frontline Plus. I never really know what people are saying about "ticks" being found on the dogs though. Every day we run them off leash and they come in with ticks "on" them -- alive, and walking n them. We try our best to give them the once over (and ourselves, of course) and flush ticks down the toilet.
If we are vigilant about the Frontline, we sometimes find ticks "on" the dogs - as in they have bitten the dog and are still attached - but are dead. I rarely find a tick "attached" to my dog that is alive, but if I do, it is usually small (not engorged) and I generally believe it to be a new one (that would have died if I didn't pull it off).
Occasionally we will find an engorged tick that is still alive on one of the dogs, but that is usually if I've forgotten - we do have to be very vigilant - every 30 days for ticks around here. We do not have fleas to worry about.
So...if you want a "tick repellent" - Frontline is not going to do that. It doesn't repel the ticks (as in keep them from biting the dog), but kills them rather quickly if they do bite.
That said, my younger dog (2.5) tested positive for Lyme this year and went on a month course of Doxy. Interestingly, my 11 year old tested negative and has never tested positive. Both dogs are routinely vaccinated for Lyme, given the prevalence of ticks and Lyme in our area. (And being vaccinated will not make them test + for Lyme disease).
Good luck - it is hard and it's a little scary. We basically know that we are all in danger of tick bites and Lyme exposure but what can you do? Can't stay in the house all the time - I have hunting dogs, so they will also not be happy on a leash or in the mowed yard forever.