The negative attitude toward dogs persists in the Talmud , which frequently regards dogs as dangerous animals. Though the Talmud in Baba Kama states that it is permissible to keep certain kinds of dogs that are useful for preventing infestations of vermin, it also states that dogs must be kept chained and that those who “raise” (the Hebrew word used here is the same as the one used for rearing children) dogs are cursed. Elsewhere, the tractate records a case in which a woman miscarried because a dog barked at her. One talmudic sage states that the owner of a dog whose bark is capable of triggering a miscarriage causes the presence of God to depart from the Jewish people.

In the Jewish mystical tradition, dogs are symbols of the demonic. The Zohar, the core text of Jewish mysticism, says that evil in the world is like a vicious dog on a long leash.

The Mishneh Torah (a 12th-century code by Maimonides) states that one must keep a dog chained, because these animals are known to cause “substantial and frequent” damage. Maimonides permitted Jews living in border towns to let their dogs loose at night only, presumably for protection. The Shulchan Aruch (a 16th-century legal code) takes a somewhat less restrictive approach, saying only that an “evil dog” must be bound in iron chains. Similarly, Rabbi Moshe Isserles, a 16th-century Polish scholar also known as the Rema, in his commentary on the Shulchan Aruch writes that a dog that is liable to harm people must be kept chained.

Among modern religious authorities, Rabbi Jacob Emden, an 18th-century German authority, permitted dogs for economic or security reasons. However, to keep a dog merely for pleasure is “precisely the behavior of the uncircumcised,” he said. However, this is regarded as a minority view. Most contemporary Jewish authorities maintain that there are no prohibitions on keeping dogs provided they pose no threat to people or property.

The negative attitude toward dogs persists in the Talmud , which frequently regards dogs as dangerous animals. Though the Talmud in Baba Kama states that it is permissible to keep certain kinds of dogs that are useful for preventing infestations of vermin, it also states that dogs must be kept chained and that those who “raise” (the Hebrew word used here is the same as the one used for rearing children) dogs are cursed. Elsewhere, the tractate records a case in which a woman miscarried because a dog barked at her. One talmudic sage states that the owner of a dog whose bark is capable of triggering a miscarriage causes the presence of God to depart from the Jewish people.

In the Jewish mystical tradition, dogs are symbols of the demonic. The Zohar, the core text of Jewish mysticism, says that evil in the world is like a vicious dog on a long leash.

The Mishneh Torah (a 12th-century code by Maimonides) states that one must keep a dog chained, because these animals are known to cause “substantial and frequent” damage. Maimonides permitted Jews living in border towns to let their dogs loose at night only, presumably for protection. The Shulchan Aruch (a 16th-century legal code) takes a somewhat less restrictive approach, saying only that an “evil dog” must be bound in iron chains. Similarly, Rabbi Moshe Isserles, a 16th-century Polish scholar also known as the Rema, in his commentary on the Shulchan Aruch writes that a dog that is liable to harm people must be kept chained.

Among modern religious authorities, Rabbi Jacob Emden, an 18th-century German authority, permitted dogs for economic or security reasons. However, to keep a dog merely for pleasure is“precisely the behavior of the uncircumcised,”he said. However, this is regarded as a minority view. Most contemporary Jewish authorities maintain that there are no prohibitions on keeping dogs provided they pose no threat to people or property.

https://www.myjewishlearning.com/article/judaism-dogs/