Hi! When dogs are around livestock and poultry and in multi dog households, it's good practice to de-worm every 6 months.
Most vets breeders, rescues, shelters and hobbyists use one of these. Safe for dogs, puppies, cats and kittens over 4 weeks.
The larger quantities are labeled for livestock but the active ingredient is very safe. Most use liquid for proper dosing.
Safeguard and Panacur have the same active ingredient, Fenbendazole. The 10% solution is quite safe for dogs, given at a dosage of 1cc per 5 lbs body weight once daily for 3 days.
Strongid or generic (Pyrantel Pamoate) 50mg/ml concentration is another very safe de-wormer. Also very cost effective. That dosage is 1cc/10 lbs body weight once, then repeat in 10 days.
When ordering, be sure of the concentration for proper dosage. I've put those in bold.