Quick weight question for an upcoming trip

[Tinfoil_Haberdashery]

I wouldn't do it but then I don't start mine under weight (slowly increasing) until they are 2,5 years old. They are in their third year when they are between their third and fourth birthday.

Is it to prevent chronic injury? Seems odd--when humans are at that stage of development, we can carry a much larger proportion of our body weight.

Also, if that's what people mean by third year, etc. it's pretty confusing. It'd be like calling this the 20th century just because the year starts with the number 20--it's more intuitive, maybe, but not actually correct.