I've been charting the guinea pigs' growth since we got them. Its amazing how fast they grow! I'm pretty sure Guinness has stopped growing (almost 1 year old), but Peanut is getting bigger every day.
Guinness weighed 1 lb 8 oz when we first took him to the vet in September 2010 (looking back to some of my earlier posts, you can tell how small he was). As of March 2011 he weighs 2 lbs 7 oz. I've read that guinea pigs can grow up to a year, so Guinness could still grow a little in the next few months. We'll see!
January 2011: He takes up half the cave!
March 2011: Tall pig!
Lying down, he's about 12 inches from nose to rear.
Peanut has gotten up to 1 lb 8 oz! He was under 1 lb when we got him in early January, so hes growing pretty darn fast. He's still tiny compared to his big brother, but he's catching up quickly.
Early January 2011: SO tiny!
Late February 2011: taking a piggy nap in the cave
After just 2 months, he looks like he's double the size!
I'll update in a few months when Peanut is full grown. He's 5 months old now, so if he's anything like Guinness, he'll grow pretty fast over the next 3 months!