As long as it's not constant iow if he/she walks flat footed most of the time it's ok. I have a friend whose kid ONLY ever walked on her toes & her ped put her in special shoes. She was like 4 though I think.
Dr has me doing physical therapy her Achilles tendant isn't growing as fast as she is. So the tendant needs to be stretched. It being short causes pain when she walks.
Re: Walking on toes