I didn't assume it was Giardia. He tested positive for it. Susan told me other pups in the litter and one other litter tested positive so I had him tested for it. Some days were worse than others, there was loss of appetite, vomit, diarreah and lethargy. He's beating it now on the fourth week and second course of medicine since I've had him. He is eating more now and showing some personality.
Sorry for my delay in responding to everyone. The past few weeks have been hectic. Kane has been tested for Giardia which came back positive. He was given a 5 day course of panacur suspension. He showed signs of improvement but a few days after the meds he had vomiting and diarreah again. The vet gave me metronidazole 25mg twice daily. He has 2.5 days left of that and his stools are improving along with his appetite and energy level. I have him on royal canin puppy food for sensitive gi trac. He gained 3/4lb in the last week which puts him at 5.25lbs at 12bweeks of age.