Re: VERY mucousy poops?
Meh, I wouldn't do any dietary eliminations over occasional weird diapers. As long as baby is generally happy, healthy, and growing I'd consider it to be a normal baby variation.
Fussing during feedings is not related to allergies, AFAIK. It's usually related to something that is happening during the feeding- like a fast flow of milk, or a slowed flow of milk, or a gas bubble, etc.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"