One of the most common problems I hear from breeders are crop issues
during handfeeding. I can share with you a few tips that have worked
quite well for me but always consult an avian professional before
beginning any kind of treatment.

Slow crops are often the result of chicks getting chilled, whether in the
nest box or in a brooder. It can sometimes be yeast or bacteria as well.
We can only guess at times what the cause is, so the most important step
is to add heat. Depending on age, you want to have a source of heat as
high as 90 to 95 degrees for a chick that is not emptying. That works well
for me. Nothing will really work until you are able to get the chick warm.
The next step is emptying the crop. If you have never done this, you will
need to learn this from your avian vet. After I empty the crop, I let the
chick sit back in the brooder for a good 30 minutes. Then I make a mixture
of Pedialyte and Prozyme, (digestive additive) I also use a product called
Aloe Detoxification. This is a liquid gel made by Naturade that is
completely safe. I mix 2cc's of this and warm this to 102- 104 degrees. I
feed about 2cc's total and leave the chick to empty. (Use less on very
young chicks) Every hour I check on the chick and feed the same amount
up to 3 times a day. The Aloe gel helps to keep the crop moving, along
with the Prozyme. I do not feed formula until the crop is moving and
starts to empty. Once the crop is moving, I start adding formula but not
too thick and then use the Aloe Detox twice a day. The formula should
not be too thinned down once the chick is processing. This remedy has
worked for me. The Aloe Detox can be found at most health food stores. It
has been noted as being very beneficial in Day One chicks. It is a
wonderful treatment to prevent the onset of yeast. My suggestion is to
add 2-4 cc's to each 2 scoops formula made as a preventative. It literally
has no taste and can be given orally as well. These products are not
harmful medications but merely a holistic approach to helping a chick
empty.
Other medications can come in handy. Nystatin and Baytril are the choice
of medications for most slow crops. You can now buy Medistatin, a
powder form of nystatin, (see N.H. Bird Supply) If you suspect your chick
has yeast and bacteria, seek medical advice immediately.
It is important to recognize the signs early and act quickly. An air filled
crop, can indicate bacteria. Large, red veins (inflammation) in the crop
can be crop burn, or a slightly scalded crop.
Many breeders tend to over-feed their chicks during handfeeding. I have
even seen my own parent birds do this in the nest. Usually, we like to use
a crop bra when they see an over-stretched crop, (vet tape is made into a
sling to hold the crop up) My advice is, don't over feed. The crop should be
rounded but not stuffed to where air comes up around the shoulders.
Feeding less more frequently can solve this problem often. Though some
cockatiels are prone to having stretched crops, one can minimize the
problem buy feeding less at one time.
Avoid feeding your parent breeders soft, cooked foods. I never feed them
anything hot or cooked during breeding. I offer lots of millet sprays and
Whole Wheat breads, some fresh greens, along with their normal diet.
Another trick is using Grapefruit Seed Extract, known as GSE in their
drinking water a couple times a week. This helps ward off bacteria/yeast
problems. You can find this also at any health food store. I mix 2 drops in
a gallon of water for the flock. Having a healthy diet is where it all begins
and so I encourage feeding your cockatiels a balanced diet, high in
vitamins. Using Probiotics can also be helpful, especially after sickness or
antibiotic therapy.

I hope you will find these tips useful.
Happy Breeding,
NJM
Crop Issues In Chicks
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Meds used to help                      
slow crop.                                  7 day old chick with slow
                                                            crop.                       
                                                                                                          Crop beginning to empty
                                                                                                           after treatment.