With a belly full of worms, the dog does not feel hungry. What type of HW prevention are you using? Loss of appetite can and does occur with worm infestation. Whip and Hooks can be lethal over time. Barb Bowes Bo & Chelsea (Pyrs), Flopsy (Pyr Shep) & Machin (Doxie) The more people I meet, the more I like my dog! bamb@monmouth.com