The reason i say dont nip your baby are look what some do in 6-9 months with out nipping these are some of my older ones. and my resident frog love him blends right in with my baby and he can eat eat eat till he heart is content!! blow up the bigs and see they are starting side branches with out topping.
i will wait several more months and then decide when to top IF i top you can always cut later but once you cut its hard to put back!!
