As a loving mom to a rottweiler and a chihuahua, I am very meticulous about my pets' care. I thought that I was protecting them by putting them on Trifexis, per my vet's recommendation. I was informed that it was the only pill they would need to take to control fleas, ticks, heartworms, and parasites.
Sadly, I did not read the box carefully, and for the past year, I assumed they were protected, since I saw no fleas or ticks.
They are both indoor dogs, and are not at high risk for fleas and ticks anyway. Last week, while we were on vacation, my rottweiler became very ill while she was at the sitter's house. She was brought to a nearby animal hospital, and we rushed home. We transferred her to our local vet school teaching hospital, and after nearly dying, she underwent surgery for an abcess today. During surgery, two dead ticks were removed from her (one near the site of the abcess). I could not have been more confused as to how this could have happened.
Turns out, Trifexis is not for ticks. The vets at the teaching hospital have also told me that they have seen many cases of dogs that took Trifexis that had lowered immune systems, and they suspect Trifexis may be to blame.