Surgery does not work. Feeding liquids, feeding an affected dog by elevating his dish so he is standing while eating, are measures often suggested, but they do not relieve the problem. They may help temporarily. The best recommendation for achalasia is to euthanize the affected puppy and not to breed either parent to another known carrier of achalasia again. Some people have tried to maintain affected animals, I know of none who were successful for very long.
Affected animals become more uncomfortable with the condition as they grow older.
They are hungry, but cannot get enough to eat in a meal to satisfy that hunger. They generally lose weight and condition. They are hard to maintain as they vomit after every meal. If tiny amounts of food are given often, less vomiting may be seen, but the animal then has no regular digestive pattern, and is very hard to housebreak because of it. The best recommendation is for breeders to observe litters when first eating solids, take the above recommended measure of separating and observing a possibly affected pup, and confirming the diagnosis.