My dog has gotten picky with food this past week. She used to eat everything but now she reluctantly eats only half her bowl. She used to love curd rice and any vegetables I had given her. Now, she just eats the egg, licks up as much as the curd she can, and disregards the rest. Is this something normal that happens as she gets older? Should I stop giving her rice. She's 5 and a half months now.