Hello to all. I have a question and a few concerns that may be nothing to worry about but I wanted to run it past you guys and get some feedback. I have an APBT 1 yr old. Zoe is very small compared to all of her siblings. Her head isnt anywhere near as large, she is very lean and her chest is also very small. She seems healthy and will see the vet again soon. Id say she weighs about 40 pounds. She isn't sick, no vomiting or any indications that she is ill. Sometimes her "poo" is a bit runny but I think that's from the kids sneaking her table food from time to time. We buy her Purina dog chow and she prefers that over other brands ie: iams, science diet, beneful, alpo etc. She will only nibble at it if it isn't Purina. Her sister got out today and ran into our backyard, this girl is HUGE. My girl standing next to her was the equivalent of me standing next to my 10 yr old son. The difference in size was shocking. Should I be concerned? She is much smaller than all the other ones from that litter. I am going to post a few pics, is my baby healthy looking to you guys, please let me know. She will see the vet in February and I will ask his opinion as well, if you guys and gals see anything, make any observations please let me know. Should I look into supplements? I have found these online; Animal Naturals K9 Super Fuel Muscle Building Formula, Animal Naturals K9 Show Stopper , and DinoVite. I am at a loss about what would be best for her if anything. Any ideas, thanks to all.