Hello, my baby boy is 7.5 month weighing 8.9 kg but he is not able to sit without support and not crawling. Is this delay in his milestones? He rolls over continuously from tummy to back and back to tummy and on both sides. Attempts to crawl but not able to do it. I have started him with solid food after completion of 6.5 months. Any suggestions on his solid diet or any other suggestion? Can we give salt and
sugar in food also is cow milk preferable now?