Thanks again for all your help Anil,
Is there a way to diagnose the actual problem in his system. From looks of it he seems perfectly normal but I still would like to get the doubts out of my mind. I agree that it could be because of ticks but how can i get it tested. His stools & urine appears to be normal and there is no sign of blood in them. He does not seems to have any problem with clotting as his wound (if i may call it so) healed quite quickly when his blood sample was taken but I may be wrong.
Almost since he has been diagnosed with the disease I am giving him a teaspoon full of "LICKVIT" daily along with "MAGACAL" & "GLOSSY COAT" as advised by my vets, in addition to his daily medication of half tablet of "DOXY-CYCLINE 100" & teaspoon full of "DEXORANGE" twice. As for food he's being fed thrice twice Chapati & Milk and once "Royal Canin" with curd, which I have quite recently changed to "Venky's" & two eggs every alternate day. He weighs about 16 Kgs and his height is around 16".
He is being de-wormed regularly every month and except for the first time, I haven't noticed any worms in his stool. I would be more than happy to provide any information or adjust his diet accordingly, if required. Appreciate all your help and guidance.