Ivermectin for mites/worms - egg withdrawal

[BCBG]

Hi, really hoping someone with more experience than me can advise - my vet has given me ivermectin for my three hens but said that the advice on egg withdrawal was conflicting, but said the official line was 30 days! I had thought it was 7 days and wondered if any MNers had used it and if so, what you do? Thanks

It's 7 days for eggs and 28 days for meat. What strength have you been given?

Thanks. Not sure what the strength was, as the vet gave me a plunger with 1ml per hen in it already drawn up?