not to be harsh, but a dog should not go 4 mths without shots. if you just got the pup and it is 4 mths, definitely get it into the vet for checkup and vaccinations. but normally no, it is not harmful, i wouldn't have it around my kids though.
PitBullFan
no
chocolate will kill them
NO. It will totally make them very sick. no and do not give dogs chocolate
yes
Yes. Smoking around anything with lungs can be harmful.
A month old puppy is not weined yet. He still needs his mothers milk.
an adult
It may be allergic.
No, you should never give a dog or puppy of any age a pork bone, because if they swallow it, obviously, this will be very harmful to them and the bone can splinter. The actual pork meat would be ok to give to them.
You can wash your pup any month of the year.
Yes, the pot belly in Labrador dogs is curable for a three month puppy.
Your nine month old puppy was weaned too early. Your puppy will out grow this in time.