No problem! I haven't talked to the poor dog ever since he accidentally moved into my town two months ago so he should be original. He's all yours!
And yes, I would prefer it if you could TT out Frobert, because my town is currently in the landscaping phase and I TT to make trees/bushes grow faster pretty often. I'll be laying off on it today, though, which should give you time to TT Frobert out! Just contact me when you're done and I'll TT to the date Walker is moving so you can pick him up.
Ah, and I also have some experience with TTing to make villagers move out, so if you haven't done it before and want to keep your other dreamies I can give you some tips! Good luck :-]