Stopped by the vet for a packet of something to put on the dog to prevent fleas, ticks. A one month supply came to $19++. Also need some for the two cats. And the heartworm meds. Hmmm. $$$ Checked Foster & Grant, and the Advantix + S & H will come to about $19. But they also carry Bio-Spot, and a 3 month supply costs $5.49, and is advertised to be even better than Advantix. Is it? Anyone have some information or experience with it? F & G carries Heartguard, 6 for $25.56. And Tri-heart Plus for $17.94 Heartguard is good--Miz Picky Eater likes it. Will probably go with Heartguard, since she had been treated For heartworms before I got her, and I don't want to take any chances. But, has anyone had experience with Tri-heart?