Can anyone help us with a diagnosis? Our dog has been very ill for 4 weeks. Fever, lethargy, disorientation, low platelet count, bad liver readings, anorexia, weight loss, arthritis and weakness, depression, and now a distended belly. He's been on doxycycline and had all the tick panels and ultrasounds and x-rays. No one can put a name to it. The antibiotics don't seem to have helped. The poor guy is really sick. Can anyone help?