Is it safe to use Seresto collar and Prinovox spot-on together for dogs?

It would not be recommended to do this, as a Seresto collar and Advantage II have the same active ingredients - so you would essentially be giving your dog a double dose of medication, which may not be safe. It shouldn't be necessary to use two different flea control medications as long as you are using an appropriate size/dose for your dog's weight. If you are already using one of these products and are finding that it is not effective, I would recommend switching to a different flea medication entirely, such as Nexgard or Bravecto - these are both much more effective in my experience.

You could use both if you wanted to, as these two products work in different ways and do not have any harmful interactions. But, using both would be unnecessary - they both cover fleas and ticks. Because of this, I would recommend using one or other other, rather than both.

Yes a Seresto collar and Nexgard can be used together, however both Nexgard and Seresto are highly effective against fleas and ticks and therefore it is not necessary to double up. You can just as effectively use either on its own.

It is ok to use Seresto along with other topical products, just not oral ones. In some pets there can be a little skin irritation, so watch out for that and notify your vet if this happens. Otherwise, you should be fine to go ahead with Seresto to see if this does the trick. I would also recommend using a flea fogger to treat your home, which can be found at your local Home Depot or Lowe's. If you still don't have good results with the Seresto collar, then I would wait at least 2 weeks and consider better products such as Simparica or Nexgard. Best of luck with your flea issue and Nova moving forward. Take care!

I would not use these two products consecutively. Their combined used hasn't been studied much, but it is just safe to use only one flea/tick prevention in this case. Nexgard is a very effective product, so he should be fine going forward with just this one on board. I hope that things go well for your Mac going forward. Best wishes and take care. : )

It is certainly not too much to use a Seresto collar with Sentinel! In my experience, Sentinel alone is not sufficient for proper flea control, but is great for heartworm and intestinal parasite prevention. The Seresto collar will prevent ticks and fleas, which is quite important. To answer your question, yes, use both! :-)

I would advise against this. Advocate is fairly complete except tick prevention. If you have concerns about ticks, I recommend to switch to something like Simparica and Intercepor or you can use a collar specifically for ticks called a Preventic collar. It is designed to be worn by dogs who have flea products on. I hope this is helpful and please feel free to post any additional questions.