What flea, tick, heartworm meds are best for my swimming dog?
Great question! You are correct there are a lot of options out there, and there isn't a treatment that covers all of them. I will give you my opinion on the best medications for many of these things. Because Arthur spends time running in the woods, tick protection is quite important for him, so I recommend giving him NexGard. It protects against three different types of ticks as well as fleas, and because it's a chew, you don't have to worry about it washing off if he gets wet within 24 hours of giving it to him. It's safe to give along with heartworm protection, and for that I recommend giving Arthur Heartgard. It's an excellent heartworm preventative, and when I lived in the US, it's what I used on my dogs (there's no heartworm in New Zealand, so no need for me to use it now). Be sure to have him tested for heartworm first before giving him this medication. The test can be done by your vet. As for worms, I recommend Drontal. It's available by prescription only from the vet, but it kills roundworms, hookworms, whipworms, and tapeworms.
Updated on September 23rd, 2025