I hope necropsy can lead you to some solid answers!
Ex-battery or egg farm hens can some with some heavy baggage. Depending on how they were raised, and their individual genetics and health, they may have no problems, or they may have a boatload. Sadly, the egg yolk peritonitis is not at all uncommon with heavy production breeds such as leghorns. Because they are bred to be egg-laying machines, they tend to have the worst of the reproductive issues and are prone to internal laying problems. I'm so sorry you had to deal with it.
As for having problems-- gosh, that's probably really a mixed bag. Chickens are different to everyone. Some folks will get a flock of hens, and if a few die, eh.. who cares, they are cheap as chicks. They are just utility. Some get a flock and they become pets as well as utility, and a more close bond is made and with it comes more care in case of illness. Then there are those of us nuts that love our birds as pets and give them the same vet care as any other pet. People fall between all of those categories and limitations such as budget and access to proper vetcare can really change how a situation is dealt with.
So to answer your question-- some get lucky and face few if no problems, and then others seem to get all the bad luck. I fall into the former category. For me, the joy of having these great animals outweighs the sorrows and financial trouble I've had, but I understand not everyone can feel that way!
If you test positive for Marek's, there are a few ways to approach it. You should check out the threads where those of us are dealing with "life after Marek's". First it would be good to find out if your hens were vaccinated against it as day old chicks... it is not foolproof but may give your living hens an edge. The egg farm hens probably were vaccinated, if the operation was of any decent size. Regardless, you can assume that they all carry it even if they do not show symptoms. There are steps you can take to limit the amount of Marek's in the environment where your chickens are, which we can help you with if you do test positive. You can bring new birds in, but only if they were vaccinated as day-old chicks, and there is always a small risk. Before you make any hard decisions, wait for the results of the necropsy.
Ex-battery or egg farm hens can some with some heavy baggage. Depending on how they were raised, and their individual genetics and health, they may have no problems, or they may have a boatload. Sadly, the egg yolk peritonitis is not at all uncommon with heavy production breeds such as leghorns. Because they are bred to be egg-laying machines, they tend to have the worst of the reproductive issues and are prone to internal laying problems. I'm so sorry you had to deal with it.
As for having problems-- gosh, that's probably really a mixed bag. Chickens are different to everyone. Some folks will get a flock of hens, and if a few die, eh.. who cares, they are cheap as chicks. They are just utility. Some get a flock and they become pets as well as utility, and a more close bond is made and with it comes more care in case of illness. Then there are those of us nuts that love our birds as pets and give them the same vet care as any other pet. People fall between all of those categories and limitations such as budget and access to proper vetcare can really change how a situation is dealt with.
So to answer your question-- some get lucky and face few if no problems, and then others seem to get all the bad luck. I fall into the former category. For me, the joy of having these great animals outweighs the sorrows and financial trouble I've had, but I understand not everyone can feel that way!
If you test positive for Marek's, there are a few ways to approach it. You should check out the threads where those of us are dealing with "life after Marek's". First it would be good to find out if your hens were vaccinated against it as day old chicks... it is not foolproof but may give your living hens an edge. The egg farm hens probably were vaccinated, if the operation was of any decent size. Regardless, you can assume that they all carry it even if they do not show symptoms. There are steps you can take to limit the amount of Marek's in the environment where your chickens are, which we can help you with if you do test positive. You can bring new birds in, but only if they were vaccinated as day-old chicks, and there is always a small risk. Before you make any hard decisions, wait for the results of the necropsy.