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] .
When Do Babies Sit Up? On average, babies begin sitting up at around 6 to 8 months of age, says Michelle Baboun, a pediatric physical therapist in Florida. At about 6 months old, most babies can sit, using their arms propped in front of them for support.