Hey my 1 year old recently stop responding to his name.....but he do clapping pointing....he always look when i say where is fan where is bird...where is papa..he looks at papa and say papa....he says gaga dada dudu papa only......he s taking 3-4 steps but mostly crawling....should i be worried what should i do to increase his name respond..he was fine before but now we are staying with grandparents and his grandfather calls his name like 1000000 times may be thats too much for him...i m really worried...now he donot respond even somebdy else calls his name....