...and it was a rather large one. Do they get that big in one day? Yesterday I gave him a really good brushdown and it was not there then! Ugh, I forgot about this part of owning a dog. :-X He's been on Revolution and I've been planning on changing after someone on here said it was only 80% effective for heartworms. Now I definitely am! I just put his latest application on last week! I called the vet and will stop by tomorrow to pick up some Frontline Plus and Heartgard. I hope that works better. It kind of irritates me that the girl on the phone just said "yeah, even our Revolution sales rep says that you should use a tick collar if you are in an area with a lot of ticks". ... um..why didn't they tell me that to begin with??? ???