Is it safe for my pet to drink from the toilet?

Bacterial-related gastrointestinal problems could occur from drinking stagnant toilet water, so it is a good idea to discourage your dog from imbibing from the commode.

Special note for those who use drop-in toilet bowl cleaning tablets: If you follow label directions, most toilet bowl cleaning tablets would not be expected to cause problems beyond minor stomach upset, should a dog take a drink out of the diluted water in the toilet bowl.

Source: ASCPA