I have a two week old bottle calf that has just done great. Then yesterday he wouldn't drink his milk morning or night. He looked fine and seemed hungry, he just wouldn't drink. I couldn't figure it out. The kid says, " the red bucket is his." I thought, yeah right. He went and got the red bucket and poured it out of the white one. Lo and behold he stuck his head in and drank every drop. I would have never thought it would make any difference to a calf what color the bucket was. But the red one is what we trained him to drink from. Go figure. Learn something everyday I guess.