Over the last two weeks, I have noticed that Zoe's hip bones are protruding. Her ribs are not visible and she has not lost any weight. She is also eating well- actually eating much better than normal. She just turned 1 yr old Jan 5th. She doesn't act as though she is in pain- but she looks like a cow- with the protruding hip bones. Is it a growth spurt or something I should look into with the vet?