rats falling hair

Question
Hi! Am having two rats, male and female. My male rat has got problem of falling hair from his neck to back(before the tail starts). i am having Nonu, my male rat, from last three months. this falling hair problem has started from near about 2 weeks ago..
   recently my female rat has given birth to eight babies(11 days ago) and they all are fine(CONGRATULATE ME). and i have kept both of mom n dad separately. my Nonu seems very lazy now a days n he has also started biting outsiders. he also eats very less but whenever i give him cooked rice, coriander, spinach or other uncooked green vegetables, he behaves like he has never got the food before n sometimes even bites me while taking the food but don't eat that. today morning at 7.45, a lizard fell into his cage. when i saw his cage, Nonu was eating its tail n d lizard was in his cage. m afraid for
nonu.. PLEASE answer soon..

Answer
Your rat sounds like he has a serious vitamin deficiency. What else does he eat?   I am not sure what you mean that he eats very less. Do you mean he is not eating as much as he used to eat and do you think he is sick?  

Some lizards are toxic to other animals. THis is often part of their defense mechanism.  I think Nonu should see a vet right away.

Do you have a vet for him?