We did the puppies at 3 wks of age. They would like the babes to be off momm for at least a few hours. I did mine overnight to be sure the only DNA in the mouth was their own.
With adults, doing it right when they wake up is the best way to go. Let hte FTA card dry an hour + then package and mail.
Do NOT send blood samples for the Fanconi test. You will be asked to order a swab if you do. They are running all the fanconi tests [on live dogs] on swabs ONLY. Jon has requested this via several lists.