Just FYI over the last several years I have been running an experiment.. I only feed grain from yellow buckets, water from white and transport grain from storage to barn etc with black or green buckets.
The goats can see that yellow and always come running. Any other color and they will ignore me since I have never fed them from any other colored bucket but yellow.
I agree...they can see color, I have 2 does who prefer to drink from a white bucket..if I use either a blue or purple one, they refuse. I also tie orange surveyors tape to the middle wire of the electric fence, they can see this and know the fence bites so I've tricked them with that same tape by tying it to fence that isn't electric and they stay away.
My goats only wanted to drink out of the orange bucket then the lite green. They did not like the blue bucket. They know the lite green feed scoop is theirs and the white is for the donkeys. (it is the same scoop other than color)
They like orange kool aid but won't touch blue or purple.
That is a neat experiment. I actually always thought they could see color...never knew people thought they couldn't.
I feed out of a blue 2 gallon bucket most of the time. I sometimes use a stainless steel dish.
They seem to come running no matter what color bucket, lol. They even come running for a water bucket(white) sometimes. I dump out their water and go get warm water for them. They really like it as t warms them up and quenches their thirst so they try to squeeze 3 head in one bucket.
Sometimes they come running to me more often if I am wearing a red hat (they try to take it away from me and I say "okay you want it here *puts on goats head*...then they don't want it anymore) or my orange hunters coat. I stopped wearing my leather coat as they would chew pieces of brown leather off of it.