well puppy fat can go at anytime!!
it may happen near puberty or after, girls may gain weight during puberty so you can lose it and feel like you gained it again (but you have not).
when you lose puppy fat it feels as if you have just lost weight no different to losing weight itself. some people don't lose there puppy fat till much later on in life but most lose it between the ages of 9-14
I hope this helped you xx
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