Hi i bought these guys at about 2-3 weeks old. i bought them on the 17 Janurary 2013, These 2 that i have are both pure breed Speckled sussex, Not bantams, these are not the only things i have noticed that seem to grow slower, i recently had welsh harlequin duck that i sold, which were all smaller in age then the duck i had kept, and since seeing the duck that i had sold today they have thrived and nearly out grown my duck! im wondering if there is something that i am doing, or could be something that has happened to why this could be happening. (Pictures Below) Speckled sussex day or purchase, 17.1.13 and now . These photos were taken 11th feburary 2013, At this point they are supposed to be about 11 - 12 weeks old. They do not look much different to the last photos. Are they stunted? Is there something that could be wrong with my animals! And why do they seem to thrive after they leave my yard, I am worried i may be doing something wrong or that there is something wrong with them.