Your chicks are 5wks old when can they join the rest of hens?

It is generally recommended to wait until chicks are 8-12 weeks old before introducing them to the rest of the hens. This allows the chicks to grow strong and develop their immune systems, reducing the risk of them being bullied or injured by the older birds.

Here are some factors to consider when determining the best time to introduce chicks to the rest of the flock:

* The size and age of the chicks: Larger chicks will be better able to defend themselves than smaller chicks, and older chicks will be more independent and less likely to need constant care from their mother hen.

* The size and structure of the coop: If the coop is small or crowded, it may be best to wait until the chicks are larger before introducing them to the rest of the flock.

* The temperament of the existing hens: Some hens can be aggressive towards new birds, so it's important to observe their behaviour and make sure they are not likely to harm the chicks.

* The presence of a broody hen: If there is a broody hen in the flock, she may be willing to accept the chicks and care for them as her own.

If you are unsure whether it is the right time to introduce the chicks to the rest of the flock, it's best to wait a little longer. By doing so, you can help ensure that the chicks have the best chance of thriving and integrating successfully into the flock.