
I would say personally its easier to introduce a puppy to a cat rather than a dog to a kitten.
Only you know the nature of your dog ?
Has he/she been in contact with cats before and if so how did he/she react . Each dog and each cat is different is all I can say .
My mum tried to introduce a kitten to a mature jack russell and they hated each other on sight - so much so that she could not keep the kitten .
We have a puppy which we introduced to a cat and they tolerate each other - puppy always wants to play with the cat although shes not very impressed at times but they do live together .
If there is any doubt in your mind dont buy a kitten - at the end of the day its not a toy just to please your little girl
Lel