Oh dear.Puppy will grow big very quickly, it doesn't need much exercise at mo, too much is bad for growing bones, however the pup definitely needs socialising urgently and you can bet that's not going to figure!But in say 8 months time this dog is going to need so much exercise and stimulation if it's not to destroy the house and worse. In my humble opinion, and this is a bit controversial, but children under 8/10 and dogs shouldn't be housed together unless the parents are responsible, knowledgeable animal handlers !This is because children seem to be generally out of control, animals are seen to be purely for their entertainment with not much thought for its' welfare or needs,parents have no idea what they are doing with either kids or dog and so many dogs are bred by total idiots who don't care where they end up as long as they get their cash and the end result is .........the worst scenario. Whichever idiot put those 2 breeds together needs a smack,what he has bred is a first cross bullmastiff type,a guard type of dog with massive biting power and a need for serious exercise, which it's not going to get ...it's not the dogs' fault, it shouldn't have been born but it has found itself in a timebomb situation. What the hell is this woman thinking ?? Please try to get her to take the pup to rescue, not back where she got it as they won't care...tell her to concentrate on giving her kids a decent upbringing and leave dogs alone! I'd tell her myself! I have had to put no end of this type of dog or similar down as it has had ignorant owners who should never have got it in the first place.They are only for the experienced person.Will she listen to you or will it take a bite to make her listen?