VETSCOPE

My dog is one year and 2 months old now and the problem is that he does not eat any other food than chicken rice. Not even dog food or any other stuffs. He eats 3 meal per day but very less around 200gm only per meal. He losses his fur drastically. He often suffer with lots of ticks n gets his health down. Ticks shampoo and soap also does not cures 100 percent. Please advise