Step 1 : Introduction to the question "Which is the only domestic animal not mentioned in the Christian Bible?"
..The Bible is a collection of sacred texts or scriptures that Jews and Christians consider to be a product of divine inspiration and a record of the relationship between God and humans. Many different authors contributed to the Bible. Wikipedia Adaptations: The Nativity Story (2006), The Passion of the Christ (2004), MORE Longest chapter: Psalm 119 Did you know: "The Bible" ranks first among literary works by number of languages they have been translated into (3,312, at least one book).
Step 2 : Answer to the question "Which is the only domestic animal not mentioned in the Christian Bible?"
More animals than cats are not specifically mentioned in the Bible but many believe the exclusion of cats was intentional. Some historians believe this was a reflection of animosity held by the descendants of Israelite slaves who were held in captivity under the Egyptians. Since Egyptians held cats in high esteem, to the point of considering them gods, the slaves came to dislike, even despise, cats as they did the cats' owners and protectors. On the reciprocal side, Egyptians hated the sheep that the Israelites raised and excluded that animal from their recordings. Source: Constative.com