Hello! . Merry Christmas to everyone who is celebrating. I hope someone experienced will give me a review. I have a Hermann 20 yrs old. He had a vet check and fecal done, worms were present so he was wormed twice with panacur 2 weeks apart. I weight him on regular basis. 1.10.-668 g 13.11-682 g. Before worming and didn't poop for a few days. 5.12.-685 g 14.12.- 672 g 23.12.-671 g and today 660. So I was really upset because he eats well, is very active and looks great. His weigh is steady except the November one and I honestly dont't know how could he put on so much. He wasn't eating a lot then and wasn't active. Now he eats more but is less active. Could deworming cause weight loss?