The Alliance MP wants new laws to ban the sale of puppies in pet shops and control the breeding of dogs.
She said animals bought in shops, or via the internet, are almost exclusively bred on puppy farms and there are no controls on advertising.
"Dogs are not a retail commodity and should be bought only from licensed breeders," Ms Long said.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? email@example.com