What do you do if your puppy drinks bleach?

I would suggest keeping a very close eye on your dog to see if he has any reactions such as difficulty breathing, vomiting, swelling of the face, mouth or tongue, etc. If you see any problems, rush him/her to the veterinarian immediately.

Bleach (sodium hypochlorite) is a pretty noxious solution and very basic, so in many cases your dog won't even try to drink it unless it is very dilute. If you have bought household bleach and then diluted it down to use in the house and your dog drank some of that, he may be OK on his own.