Some dogs like to drink out of the toilet bowl. The somewhat obvious reason is that the water appears to be fresh and cool. If your dog is drinking out of the toilet bowl instead of his water bowl, is the water in your dog’s bowl fresh and cool? When was the last time you washed, really washed your dog’s water bowl or put it in the dishwasher, instead of just spilling out the remaining water and giving the bowl a quick rinse before refilling it? If your dog is drinking out of the toilet bowl after he has finished all the water in his water bowl, why is he consuming so much water? If you are trying to house-train your dog and he is allowed to drink out of the toilet bowl, you have no control over when and how much he is drinking, which leads to when or how much he has to urinate.
Here’s another thing to think about. Does your dog have ACNE? If he does have acne and he drinks from the toilet bowl, you should discuss his drinking habits with your veterinarian.
The internet is filled with articles about how “safe” it is for your dog to drink out of a toilet and that no harm will come to the dog provided the toilet has been cleaned, and the cleaning chemical has been flushed. Any standard toilet cleaning chemical is extremely harmful and is not always removed with one flush.
I want to make my opinion of this perfectly clear. I do NOT approve of a dog drinking out of a toilet bowl. If you took a swab sample from your toilet bowl, especially under the rim, to a lab for testing, you would be shocked at the number of bacteria including the possibility of E-coli, Giardia, Staphylococcus and Salmonella. It is a bad habit that should be replaced by a FRESH bowl of water given daily. Every dog needs more than one(1) water bowl and they should be cleaned daily at the very least. If your dog has a fresh supply of cool water in a clean bowl, there is no reason to drink from the toilet.
Having a fresh bowl of water available, remembering to close the lid on your toilets, use of childproof toilet lid locks, and closing the bathroom door as well, will help to eliminate the problem in most cases.
Additionally, dogs with full coats, long hair, and hairy muzzles are picking up any bacteria under the rim of the toilet. Is that dog then sleeping on the couch or your bed? Is he licking your face? Is your child hugging and kissing this dog after he drank out of the toilet?
Think toilet brush. That should help give you a clear picture.