Worms in dog water fountain filter: What are they? Are they safe?

These are likely not parasites, but rather insects that made their way into the enclosure. To be sure, you can submit them and a stool sample to your veterinarian to diagnose intestinal parasites. Clean the enclosure and water bowl as planned. Fresh water should be provided daily.

Unfortunately, I can not really see anything in the picture. But, based on your description of a long white wormy like creature, it could very well be a tape worm. I know you are squeamish with gross stuff, but bringing in a fecal sample for analysis to your veterinarian will help diagnose this problem. A dewormer, either oral or injectable, can usually resolve these issues before they get out of hand. Depending on the type of tapeworm, some of these are transmissible to people but is generally uncommon. Just be sure to wash your hands thoroughly after handling your bird or any of its droppings.

Thanks for reaching out. These appear to be Camallanus worms which are not parasitic but feed on detritus in the tank. Probably brought in by a live plant or invertebrate. Check water quality and correct any concerns. Siphoning the substrate might help decrease worm numbers. If additional concerns, a veterinary visit might be needed. Good luck.

Unfortunately, without being there, it would be hard to tell where the worm came from! If you suspect it may have come from your dog, bringing in a sample of his stool to your local vet can help them test for parasites such as worms and parasite eggs, and provide you with medication to treat it. If you see visible worms coming from your pup when he defecates, this can also indicate that he has a parasite infection. if you suspect the worm came from you, it would be best to seek the advice of a human medical doctor.

It's difficult to tell from the photo but I think these are tapeworm segments. Usually dogs are not routinely dewormed for tapeworms so I would get medication from you veterinarian to treat these. Your other dog can't get these from the puppy because they need to go through an intermediate host, usually a flea or rodent. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Tupac.

The picture does not clearly show any tapeworm segments but remember there are many types of roundworms also whose eggs require a microscopic exam. If she eats non-food items regularly she should be dewormed monthly as a precaution

It's gross, but it shouldn't cause any harm. Maggots are just a type of larvae. You should try to figure out how they got in there, though, since they wouldn't have developed there - they had to have been deposited there by something else drinking the water or being near the bowl.