I have a baby girl that was born January 12. she has been fine up to now. I have milked and feed her the milk and she is eating sweet feed. Yesterday I noticed she didn't want to finish her bottle 3 cups morning and night. Also she walks slow and like her front legs bother her. She is in a hay shed and not wet so what can it be? The other baby born Dec 17 is in there with her and same thing I do for her and she is fine. Any help please.