I second what Poodlemana said. I had one litter of pups, not poodles though, and there was one who was significantly smaller than the rest. While he was the first one born, he was the last at everything else. He probably does need some one-on-one time with mama to get some extra nutrition. The "runts" tend to mature more slowly than their siblings and just take longer to get active, show great curiosity, play with the others. And I agree you should express your concern to the breeder also. Being a first time breeder she just may not know about this. Someone had to help me with my little one.