Why is Dalmatian capitalized and not beagle?

"Dalmatian" is capitalized because it refers to a specific breed of dog that is named after the Dalmatia region in Croatia, reflecting its proper noun status. In contrast, "beagle" refers to a general breed of dog and is not derived from a proper noun, so it is not capitalized. Proper nouns, like breed names derived from geographic locations, are capitalized to signify their uniqueness.