Finally Introducing Myself (And My Pigs!)

Hello everyone! My name is Kim, and I actually joined in December, but I only got guinea pigs two weeks ago. I found this website in November when I was first thinking about getting guinea pigs. I wanted to build a cage instead of buying one because it would be bigger and probably cheaper. I looked up "How to build a guinea pig cage" and found this website! I had been planning to just buy guinea pigs from the pet store, but I read about petstores and decided to adopt. After I built my cage and put pictures on Facebook, my uncle saw and asked if I would take his guinea pigs! So after my family and I were done on vacation, we stopped at his place and took the guinea pigs home.I have two female guinea pigs, named Penelope and Molly. Penelope (Or Penny for short) is a black and white long-haired, and she is five. Molly is a six-year old brown/white/black Abyssinian. They are currently in a 2x4 C&C cage, with a 1x2 loft for their kitchen. I am hopefully going to make the loft into a 2x2, because they do get into little squabbles. So that's pretty much it... Sorry it is so long. I do have one question though. They really like carrot tops, but I don't know how often I should feed them or how much. Can anyone tell me? Thank you!