The pictures of the smaller plant were past pictures of the same plant before your cat ate it, correct?
If so, the theroy that the plant was flowering and then re-vegged is exactly what happened. The pictures of it when it was small clearly shows female pistils. This means more good news, because your plant is definatly female and when you flower it now you will have a monster plant that will yeild much more then if it had completed flowering in it's initial smaller stature. I would flower soon as the plant looks like it is certainly big enough.
Your cat almost did you a favor!

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