I have 3 kid goats 2 months old approx. 5lbs one is getting weak for some reason her eyes are matting she falls when she walks she just lays there most of the day. The other 2 play and act normal. I have penicillin but is she to small to give this too? I feel so helpless not knowing what to give to make her better. Any advice anyone has would be greatly appreciated. Thanks.