I have had dogs all my life but this is my first golden. She is 4 months old and eating has become a little problem. She will not eat that much during the day for whatever reason. She will just leave the food in the bowl all day and kinda nibble on it. We have been feeding her three times a day as recommended by our vet. She was doing pretty good and now she won't really eat at all unless you put the food directly on the floor. Is she just being fussy? Should I worry about it ??