Ant Nay :
The only thing I am concerned about is that your little boy is not completely housebroken yet. And at 4 months old I suppose he is not neutered yet. Since he cannot be trusted yet, he is not going to be the one training Lizzie to go on piddle pads. I am afraid you will end up having 2 dogs you cannot trust in that area at least for a little while. Lizzie being in a new environment might regress on the beginning. And your boy not being neutered yet might start to mark his territory or try to
her. (I can't believe I am using that smily, but you all educated me about it
)
I don't want to discourage you, but it might be something to think about it.
The only thing I am concerned about is that your little boy is not completely housebroken yet. And at 4 months old I suppose he is not neutered yet. Since he cannot be trusted yet, he is not going to be the one training Lizzie to go on piddle pads. I am afraid you will end up having 2 dogs you cannot trust in that area at least for a little while. Lizzie being in a new environment might regress on the beginning. And your boy not being neutered yet might start to mark his territory or try to


I don't want to discourage you, but it might be something to think about it.