What are these black worm like bugs in your dogs water?

These are most likely mosquito larvae, also known as "wigglers". They are not harmful to dogs, but they can be unsightly and they can attract other insects, such as adult mosquitoes.

To get rid of mosquito larvae in your dog's water, you can:

- Empty and rinse the water bowl regularly.

- Add a small amount of apple cider vinegar to the water bowl.

- Cover the water bowl when it is not in use.

- Place the water bowl in a shady area.

- Use mosquito dunks or larvicide to kill the larvae.