Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
I bought Nemex-2 to start deworming puppies at two weeks old. I was looking up other things that puppy need to take and I saw that they needed heartworm, flea and tick prevention. At how many weeks should I start giving heartworm chewables and stop the Nemex-2 since it also contains pyrantel? Also, for the flea and tick prevention chewables, which one is best and also at how many weeks old should I start it for them or should I buy the ones that are just applied to their coat?
1 Answer

Answered By Laura Johnson VMD
Veterinarian
Published on February 14th, 2018