Prabhupāda: It is very rightly written, śva-viḍ-varāha uṣṭra khara. Śva-viḍ-varāha uṣṭra-kharaiḥ saṁstutaḥ puruṣaḥ paśuḥ. The general mass of people is no better than these animals, and they are voting to select their leader. So whom they will vote? Another paśu, another animal. Because they have no choice. They are animals, and how they can select a man? A man means karṇa-pathopetaḥ, one who is hearing about Kṛṣṇa. He is man. Otherwise, all animals. Now, you say, how this charge can be refuted by you? Bhāgavata says: "He is not a man." Na yat-karṇa-pathopeta jātu nāma gadāgrajaḥ. He may be in the form of a man, but if he has not heard about Kṛṣṇa, if he has not given aural reception to kṛṣṇa-kathā, then he is paśu, animal. And what kind of animal? Dog, hog, camel, asses. Why these nice animals have been selected? That is described.
Now you can read the purport.
Pradyumna: "The general mass of people, unless they are trained systematically for a higher standard of life in spiritual values, are no better than the animal, and in this verse they have been particularly put on the level of the dogs, hogs, camels and asses. Modern university education practically prepares one to acquire a doggish mentality to accept the service of a greater master."
"Like the dogs, after finishing the so-called education, the so-called educated person move from door to door with applications for some service, and mostly they are driven away, informed of no vacancy. As the dogs are negligible animals and serve their master faithfully for bits of bread, similarly one serves a master without sufficient rewards. Persons who have no discrimination in the matter of foodstuff and who eat all sorts of rubbish are compared with the hogs. Hogs are very much attached to eating stool. So the stool is a kind of foodstuff for a particular type of animal. And even the stones are eatables . . ."