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 he is about 4 months old, his neck muscles will rapidly grow stronger, helping him as he learns to sit up. Your babyâs physical development progresses from the central part of his body to the peripheral parts -- his arms and legs.ou are probably curious about when your baby will be ready to sit up by himself. He starts getting control over larger muscles before learning to control the smaller muscles of his body.