I know Trifexis has a lot of bad publicity especially on this site but I use it for fleas and heart worm. Piper is 6 plus and Jilly is 5 pounds. We give half of the pill with food on the first day of the month and half of the pill with food on the second day. No problems and no fleas. I don't think dogs under 5 pounds should take it. This has been my personal experience. |