Credit: SWNS Just Givingbr br A little boy shaved his head so his toddler sister wouldn't feel alone when she lost her hair after being diagnosed with cancer.br br Milo Woolard, five, braved the clippers to support his two-year-old sister, Zella, when she was diagnosed with neuroblastoma - a cancer which develops in her nerve cells.br br Mum Rachel, 26, took Zella to the doctors when she noticed the tot having issues sleeping and with her vision, but didn't think it would be anything serious.