Roundworms Parasite Overview Roundworms commonly live in the intestinal tract, but can also be found in the eyes, lungs, body cavity, and under the skin. Merck Animal Health Solutions For Roundworms SAFE-GUARD® CANINE Dewormer for Dogs Only for the treatment and control of Roundworms (Toxocara canis, Toxascaris leonina), Hookworms (Ancylostoma caninum, Uncinaria stenocephala), Whipworms (Trichuris vulpis), and Tapeworms (Taenia pisiformis). Learn More SAFE-GUARD® AQUASOL – Poultry Safe-Guard AquaSol offers deworming for broilers, breeders, pullets and laying hens through oral administration via drinking water. Learn More Clinical Signs Abdominal breathing Loss of body condition Respiratory signs Marked unthriftiness