Yeah, I agree with Flea. Chances are the bucket has "put her off" and now her usual poos are a bit impacted IYKWIM........a simialr thing happened with Olivia (age 3 also) when we moved house.......the new loo seemed to put her off for some reason.

After 4 days it all came out: HUGE poo..........No issues after that at all

My advice would be to make sure she is getting lots and lots of water, don't make a big deal of it, and hope it all comes unstuck soon.........