Secondly, they aren't white.. While some double merle dogs are almost pure white, they can go the complete range all the way up to a dog that you would think is a just a normal merle (most fall somewhere in the middle).
In between five and six months, your baby usually starts to sit up with your help, holding his head in an upright position, keeping the back straight. He may even be able to sit for a second or so without taking any assistance from you, before toppling down after a while [1] .
Knowing what to look for and how to help your baby learn to sit on her own is important. Your baby might start sitting as early as 4 months old or as late as 9 months. Don't try to rush it. According to pediatrician, Dr. Kurt Heyrman, you should make sure she has some specific large motor skills such as she should be able to hold her neck up, have some balance, and have trunk muscles.