My personal belief about worming is that it
should NOT be done 'routinely'.
Unless animals are known to be infested with worms, they should not need treating.
Routine treatment can weaken their natural immunity to worms.
I would not use Safe Guard, as its active ingredient - Fenbendazole (C15H13N3O2S )
is far from 'natural', and can be toxic:
from Wikipedia:
Toxicity
Despite being widely used as a dewormer in many species, toxicity has been reported.
Birds (storks, pink pelicans, vultures, pigeons and doves) and reptiles (vipers, turtles and
tortoises) have shown toxicity associated with bone marrow suppression, intestinal crypt
cell necrosis and distal villi sloughing. Abortions in domestic ruminants have been
associated with concurrent use of anti-trematode therapeutic agents.