Mixing Chickens Of Different Ages

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If you’re new to the world of chicken keeping, chances are that you decided to start out small.

It’s a good idea to take it slow when learning how to keep a new animal, to soften the learning curve by starting out with just a few in your flock. Your chickens will be grateful for your careful consideration.

It’s very likely that in the future, you will want to expand your flock as you learn the ropes of successful chicken tending.

Chickens offer so much in the way of eggs, fertilizer, turf removal, and entertainment, it’s almost a guarantee that you’ll want more as soon as possible. 

It can be a harrowing ordeal introducing new chickens to any existing flock, but when the chickens in question are of different ages, it’s important to be especially careful. Mixing chickens of different ages can be successful if you are informed and prepared.

This guide will outline the methods for safely mixing chickens of different ages, things to consider before attempting this, and prepare for any outcome. 


How to Mix Chickens of Different Ages

Gradual Introductions Are Best

Slow is the way to go when integrating chickens of different ages into the same flock. Rushing the process will only result in unnecessary harm and stress to your chickens (and you!)

You will want to use some type of barrier so the chickens can see the newcomers but not come in contact with them.

Chicken wire and hardware cloth are great inexpensive options for creating temporary enclosures that allow visibility. Do this for about a week before moving on to the next step.

After they’ve had a week to get used to the presence of the new birds, allow the groups to interact physically but under close supervision.

Some scuffles are expected during this time while the new pecking order is established, but if an altercation continues beyond a few minutes, then remove the newcomers and resume introductions the next day.

This can sometimes take several attempts.


Methods for Introducing Chickens of Different Ages

Reverse flock introductions

There are four common methods of gradual introductions:

  1. Free-range introductions
  2. Neutral territory introductions
  3. Reverse flock introductions
  4. Nigh time introductions

Free Range Introductions

Free-range introductions are best because it allows chickens to familiarize themselves with each other in a low-stress environment with plenty of space.

Begin by allowing the new chickens to free range in an area you can supervise. 

After a few minutes have passed, open the gate to your existing flock’s run and allow them to join the new birds.

This two-stage introduction allows the younger birds to gain a slight advantage by being the first players on the field.

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Additionally, a free-range environment allows for plenty of room for harassed birds to retreat to safe spaces. It also provides plenty of distractions to occupy the attention of more aggressive birds. 

Neutral Territory Introductions

If you don’t have the space for a free-range introduction, a neutral territory introduction works best to ease the process of mixing chickens of different ages.

Begin by choosing a setting that is unfamiliar to both the young and older chickens. Setting up an X-Pen or similar enclosure somewhere on your property that your birds don’t regularly spend time in is best.

Once again, allow the younger and less established birds into the enclosure first. After about 15 minutes, put the older birds into the enclosure with the younger ones. 

Provide plenty of scratch and fresh food scraps to distract the birds from fighting with one another. Be sure to pay close attention during this time and not allow any of the younger birds to be victimized.

Reverse flock introductions

Instead of introducing the younger chickens to the more mature flock, try to introduce the older chickens, one at a time, to the new flock.

This overrules any advantage that a ranking flock member would have over new chickens, and allows the younger birds to establish themselves safely. 

Reverse flock introductions create a more neutral setting for the pecking order to reestablish itself and peacefully make room for younger birds. 

Night Time Introductions

At dusk, when all your birds go in for the night, allow at least 2 of the new birds to follow them in to roost. The idea is that all the birds will go to sleep together, not allowing an opportunity for altercations. 

When the sun comes up, the older birds will see the younger birds in their coop and automatically accept them as part of the flock.

This method has had mixed results. It has the highest rates of success when introducing chicks of different ages in the brooder box.

This method is not recommended for flock integrations with known aggressive birds or those with notable variations in bird size.


Things to Consider Before Mixing Chickens of Different Ages

Things to Consider Before Mixing Chickens of Different Ages

As stated previously, mixing chickens of different ages needs to be done with caution. Chickens naturally use a pecking order to establish a hierarchy in their flock.

When mixing chickens of different ages, the younger birds are at an automatic disadvantage to the more mature ones. Severe injury or death can occur to the younger birds if this process isn’t overseen.

There are several factors that can help you predict the outcome of mixing different aged chickens.

Following these rules of thumb and informing yourself of some rudimentary chicken behaviors will help ensure your new introductions will go smoothly. 

Rules of Thumb

Before attempting any introductions, consider the makeup of your flock. 

  1. A flock with a rooster is generally more hospitable to new hens, regardless of age. This is because a rooster is the undisputed king of the pecking order, and the hens don’t clamor for dominance as much. 
  2. Additional roosters should never be introduced to a flock that already has one. This will always result in losing one, and sometimes both, roosters. 
  3. Suppose young hens are not being accepted even after implementing the approaches outlined in this guide. In that case, they should be kept separate at least until they are the same size or stage of development as existing flock members. It is detrimental to a young hen’s health to expend energy resources dealing with stress, healing injuries, and resource competition.  
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Are they in the same family?

Before mixing chickens of different ages, consider their lineage. Chickens born of the same hen will integrate within the flock just fine.

The mother hen will protect her young from the other flock members until they’re old enough to fend for themselves.

If the chickens are unrelated to the existing flock, then steps need to be taken to ensure the younger chickens aren’t harassed excessively.

The methods outlined in this article are directed towards mixing unrelated chickens of different ages. 

What breed are your chickens?

Some breeds, like Silkies and Rhode Island Reds, are naturally more territorial than other breeds. If your flock includes these breeds, be prepared for a little more tumult than with the more passive breeds.

Are the new chickens healthy and disease-free?

New chickens should be quarantined for at least 2 weeks, but ideally one month, to look for signs of disease that could affect the rest of your flock.

This is a rule to follow regardless of any age difference between chickens, but adult chickens are far more likely than chicks to carry disease


Prepare Yourself In Advance

Set your flock up for success by ensuring you have enough room in your coop and run to accommodate more chickens. Overcrowding leads to stress which almost always instigates fights between chickens.

Make sure to add in extra feeders, waterers, and plenty of scratch and treats to put the birds in a good mood and reduce resource competition between the younger and older birds. 

Have a first aid kit on hand. If any chicken appears bloody, remove and treat the wound with styptic powder and blu kote if necessary.

Be sure to have accommodations, like a separate enclosure, ready in case you need to separate an overly aggressive or injured bird. 


Summary

Chickens can be stubborn and territorial creatures but don’t let this stop you from expanding your flock. If proper precautions are taken, you shouldn’t have a problem mixing younger birds with your older birds.

Just be sure to follow a few rules of thumb, be patient with introductions, and be willing to try a different method if your first isn’t working out.