I just found one of my 4 week old holland lop kits tilting his head to the side. I clean on a daily basis, they are fed a high quality pellet, unlimited timothy hay, fresh water in water bottle. Is it common for a young kit to have this? I had a 2 week old about 3 weeks ago, that kit was tilting and twisting. It was put down. What now?? None of my others are showing any signs of anything. They are in stackers. I have approx. 30. Help! I have panacur, ivermectin, various other things in my medicine kit that I have never used. Any suggestions? Thank you