If they have been on dirt since they hatched it is possible that they do have worms, and as far as I know, Safeguard can be used to treat any age poultry.Poults hatched on May 5 should not be on Safeguard, nor any wormer. It could kill them.
If raised in a brooder, not on dirt, this is true, but if they been out on dirt, or under a broody, they can get blackhead at a very young age.They also should not have blackhead already.
Really? I've used it to treat blackhead in young ones and it didn't kill them, but I weigh them and give the proper, safe dose.The medication, Metronidazole, will kill poults that age.
Sometimes it kills quickly, sometimes it does not.Blackhead kills in about 48 hours so if they did have it, they’d be dead already