Oh, they are so cute! But puppies grow very fast, my daughter said that our dog grow bigger every day.
We are famous for "Stockholm syndrome": "Q: Hey, what's up with Matt? His Dad is on social security, his mom got laid off, his sister's kids get free school lunches, he collects federal financial aid for college, and he only makes minimum wage working at Walmarts. Yet he keeps talking about how we need to cut taxes for the wealthy and quit spending so much on social programs. A: Yeah, he thinks he's going to be a millionaire soon. He's got Economic Stockholm Syndrome." (Urban Dictionary)
Yes the collars are to tell them apart at a glance, tough they are actually quite different upon a closer look. The red one is the one that was born by caesarian, and is a lot thinner than the two other piglets.