Hi, i am new at raising chicken, i have 2 and have been feeding them as much as they wanted to eat, but I now think that was not the best thing to do. They are 20 weeks old and quite big... So I started limiting their grain intake and giving them extra greens for 2 weeks now. One of them just started laying eggs. Just this week though, one of my girls seems to have difficulties walking. Could she be too big? I have been giving about a cup per day of grains per chicken plus greens (brocoli, peas, salads...). Is this still too much or not enough? It's winter here but I've managed to keep the coop between 5 and 15 degrees Celcius most of the time so her feet are not frostbitten. I also clean the whole coop once per week and lay new bedding. Any advice would be very helpful 
