In a pet shelter which is most important for the shelter to do have the animal spayed and neutered or give vaccinations?

Answer 1

Animal shelters cannot afford to spay/neuter or give vaccinations to all the animals they take in, especially since 3/4 of the animals end up being euthanized (killed) anyway.

When the shelter takes a cat or dog in, they give it a quick physical exam, to make sure it has no dangerous, contagious diseases that can be spread to the other animals in the shelter, but they do not vaccinate them. This is why, when you adopt a cat or dog from a shelter, they often come home with mild respiratory infections, the equivalent of a kittie or doggie cold. Mild infections like these will usually clear up on their own, but you should take the animal to the vet just in case.

Once you have decided to adopt a cat or dog, the shelter will give the animal certain basic vaccinations before you take it home, and, if the animal is old enough, they will spay/neuter it for you. If the puppy or kitten isn't old enough to be spayed/neutered, they will show you where you can get the animal spayed/neutered for a low price.

Once you have adopted your new pet, you should take them to the vet for a full checkup as soon as possible, to make sure the shelter didn't miss anything, and to find out if any additional vaccinations are needed, and to find out what vaccinations will be needed in the future.