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] .
Signs your baby is ready to start sitting up. By 4 months old, your baby will probably be able to hold his head steady when he's upright â but most babies' heads will still fall backward when their upper bodies are pulled up to a sitting position.