by crazychick on May 10th, 2008, 8:48 pm
Hi all,
Just wanted to make a quick observation: the website quoted above from dlhunicorn's site (which is an excellent site) is for blocked gizzard, which is not at all the same as blocked/impacted crop. The crop is a storage pouch located at the base of the esophagus, and is easily seen and felt on the hen's body - no digestion occurs here, but the food is "lubricated" with secretions from the bird's crop walls. The crop then pushes food on into the proventriculus, which is like our acidic/bile stomach. Here, the food is chemically digested, just like in our own stomachs. From the proventriculus, the food goes on to the gizzard, which is a tough, muscular organ that physically grinds the food (mixed with grit etc) to digest it further. From the gizzard, the "food" now enters the small, then large intestine for further processing. So an impacted gizzard is not treated the same way as an impacted crop (badly impacted gizzards usually require surgery and are difficult to diagnose), and is not that common in chickens. Impacted crop is far more common, but is every bit as dangerous. There are many different ways to treat an impacted crop, but I usually go this route (three things to try): 1) oil/liquid paraffin is given orally, usually a couple of tablespoons. Massage the crop vigorously then leave the hen be for a few hours... then repeat. If the impaction is made up of smaller pieces (shavings, short straw pieces, grains...) often the oil is enough to get the mass broken apart and moving through. If the crop is full of long, snarled grass, though, usually we're on to step 2): Using a feeding tube (I can post instructions below on how to do this) give the bird 40-60 cc of warm water. The object here is not to make the bird regurgitate, as she will only bring up the water, not the stuff blocking her crop. Give her the fluid, then massage GENTLY, to try to physically break up the mass of grass/straw/shavings and get it "in solution", so to speak. If you can get the mass to start to break apart with all the fluid, there is a good chance that the ball will start to unsnarl and work its way through out of the crop. The natural contractions of the crop squeeze all the fluid out - even that which is produced by the crop itself - leaving the mass in the crop a dry-ish lump that is impossible to move through. That's why the large amount of fluid given all at once is needed in order to break that mass apart. This procedure should be repeated up to twice a day, or even just once per day, depending on progress. Don't allow the bird to have any solid food when they are impacted, as it not only leads to further impaction, but can sour as well. That's why things like babyfood puree or baby cereal and yogurt are good, as they work their way through the mass and into the proventriculus without too much trouble, keeping the bird's calories up.
If steps 1 and 2 fail, your next logical choice is 3): surgery. A vet can do this with general anesthetic (which is dangerous, especially if your bird is very thin and very stressed from the crop impaction..., which is why you want to make this decision when the chicken is still relatively healthy and bright). A small incision is made through the skin and muscle of the crop and the muck is pulled out. Then the skin/muscle is then sutured shut and the chook is put on a soft diet for a few days to allow the crop to heal and come back to normal size.
Hope this helps clear some possible confusion up...
Laura
PS: Allan - thank you for the yogurt recipe - I love yogurt (LOVE yogurt) and so does my husband. I think I might try making some myself, now... and we can share it with our chooks!