Thanks for the update but I am so sorry you lost her and even more so that you had a traumatic time at the vet's.
Unfortunately you cannot rule out Marek's with any certainty in cases like these unless you get a necropsy. The nature of Marek's is such that there can be a huge variation both in symptoms, severity and occurrence of outbreaks with weeks, months or even years between cases, particularly if you don't have any adolescent birds in the flock. Of course it may not be Marek's but it is worth being informed about the disease and vigilant and keeping your flock as stress free as possible .... and your fingers crossed! It is an extremely common disease..... on the sort of level as cold sores in humans.... both are Herpes Viruses,
Unfortunately you cannot rule out Marek's with any certainty in cases like these unless you get a necropsy. The nature of Marek's is such that there can be a huge variation both in symptoms, severity and occurrence of outbreaks with weeks, months or even years between cases, particularly if you don't have any adolescent birds in the flock. Of course it may not be Marek's but it is worth being informed about the disease and vigilant and keeping your flock as stress free as possible .... and your fingers crossed! It is an extremely common disease..... on the sort of level as cold sores in humans.... both are Herpes Viruses,
