Why does my dog pee a lot?

yes, you do need to take your dog in to the vet so they can take a bloodwork and a urinalysis to help determine the cause. Some common causes can be diabetes, Cushing disease , Addisons disease, urinary infection, ect. (this is only naming a few) Not to scare you but it is something that should not be over looked. There are several diseases that occur (more commonly in older dogs) that would cause them to drink more and urinate more. Depending on what the cause is there are medicines that will help.
Best of Luck!

FYI- when you do take your dog to the vet, do not let him urinate right before he goes to the vet. Your veterinarian is going to need a urine sample so try to avoid letting him urinate when you leave your house or as you are entering the vets office.

I don't know what a lot is to you, but I have an old dog that has a significant bladder control problem. At times I literally have a flooded garage floor. I think your first step is to take your pet to the.