I have a chihuahua and they seem to be very smart and it has a big brain so yes is my opinion!
The dog breed with the largest brain size is the Newfoundland. This breed is known for its intelligence and strong work ethic.
The Irish Wolfhound is the tallest breed of dog, but not the heaviest.
The largest short-haired dog breed in terms of size and weight is the Great Dane.
Chihuahua is the smallest breed of Dog, whilst the Irish Wolfhound is the largest.
The Great Dane is the second tallest dog breed, smaller only than the Irish Wolfhound.
The largest breed of dog is the Irish Wolfhound, growing to about 3 feet tall.
Large dog breeds include:Great DanesMastiffsWolfhoundsSt. BernardsGreat Pyrenees
The tallest breed of dog is the German Great Dane. However, the heaviest breed is the Swiss St. Bernard.The smallest dog ever is the Chihuahua from Mexico. It is also the lightest breed of dog.The smallest dog breed on average is the chihuahua at 5-7 inches tall. The largest dog breed on average is the Irish Wolfhound at 34-36 inches tall.
the largest dogs are great danes
St. Bernard.- heaviest Great dane largest
Chihuahua
old english mastiff