"We got Stoli (right) 3 years ago when we were in college back east at UNC. The first picture is her at 7 weeks old. She is a short-coat fawn with black sable. As she grew older the black sable faded and she is almost completely fawn except for the black stripe on her tail. We had to work hard to keep her from getting "small dog syndrome, " which makes many toy breeds yappy and disliked by strangers. She bonded with many friends and family members and I took her to class with me and on the bus. I even took her babysitting with me and she now LOVES kids which is not a common trait in small dogs. Because of our hard work to treat her like a dog and not a fragile little toy she is very well behaved and not terrified of people and new surroundings. She also knows over 15 tricks and loves to perform! Stoli is 3.8 pounds and almost 3 years old. Just over a month ago we decided to get a playmate for Stoli that was her own size. This first picture is Roxi at 8 weeks and 15 ounces. She is a longhaired Chihuahua and should get up to 3-3.5 pounds as an adult. Her full long hair will not mature until she is around 1 1/2 years old, and in the meantime she will go through "puppy uglies" which is the awkward teenager stage for long-coated breeds between their puppy and adult coats. Her color is technically black and tan with a partial white collar and white feet. She also has merle markings that give the spotted blue and black pattern to her coat. The merle gene leeches out the most of the color from the black part of her coat leaving the grey/blue areas. It has also affected her eye color, which is marbled blue and brown. The merle Chihuahua is banned from some organizations around the world, but the AKC still allows for it in the show ring. The reason for this is possible health concerns associated with the gene. But we love little Roxi to death and she is completely healthy and growing fast! Walking around town with these two we get stopped constantly to be asked what kind of dogs they are and to tell us how cute they are. Recently we have been hearing kids yell out "Mommy look they are from Beverly Hills!" due to the new Disney movie."
One of the most amiable hounds, the Beagle was originally bred to be part of a pack and needs companionship, whether human or canine. This dog loves to explore the outdoors and is an enthusiastic trailer. Given adequate exercise, the Beagle is a calm, tractable house pet. Beagles tend to be excellent with children, gentle, incredibly tolerant, and always ready to join in a game or adventure. This is an independent breed, however, and may run off if a trail beckons. Beagles bark and howl.
In a 2014 literature review of dog bite studies, the American Veterinary Medical Association (AVMA) states that breed is a poor sole predictor of dog bites. Controlled studies have not identified pit bulls as disproportionately dangerous. Pit bull-type dogs are more frequently identified with cases involving very severe injuries or fatalities than other breeds, but the review suggests this may relate to the popularity of the breed, noting that sled dogs, such as Siberian Huskies, were involved in a majority of fatal dog attacks in some areas of Canada. Bite statistics by breed are not tracked by the CDC, AVMA or the American Society for the Prevention of Cruelty to Animals (ASPCA). State Farm Insurance spokeswoman Heather Paul stated "Pit bulls in particular are often misidentified when a bite incident occurs, so reliable bite statistics related to the dogs’ breed are unreliable and serve no purpose." The White House stated that "the Centers for Disease Control and Prevention looked at twenty years of data about dog bites and human fatalities in the United States. They found that fatal attacks represent a very small proportion of dog bite injuries to people and that it’s virtually impossible to calculate bite rates for specific breeds". 
I have a chiuhuahua border terrier cross. He’s just about 16 months old. It’s just me and my husband and he loves us equally. He hates kids, always barks and growls at them. He surprisingly likes most other people, unless my husband isn’t around, he gets protective over me if men come around me. He likes all dogs, big and small. He jumps at them and is very playful. He’s also very snugly and sweet. I have noticed the tranchea problem with him though and also his eyes water all the time. He’s fixed and still only weighs about 5 lbs. he’s been hard to potty train- he wouldn’t go out into the snow until this year. I usually have to carry him on walks in cold and wet weather because he’s always shivering. he’s inquisitive, likes to wander.. we have to keep a close eye on him at the dog parks because he can wiggle his way under the fence to run after the dogs! Definitely the best dog I ever had, he’s got the most unique personality, he’s not ‘yappy’ for the most part.. just at night when I’m trying to sleep lol.
"This is our 8-month-old, 4.5-lb. Chihuahua Tequila. We call her Tiqi as a nickname and we love her to death. She's very energetic and I'm glad to see your site lists that they should be walked daily. Lots of people think that because she's so little, she doesn't need it, but her behavior is so much better when she's been exercised. She's very social and believes that any person she sees is there for the sole benefit of petting her. She's never learned to bark, which is fine for us. She does well with other dogs and children and is very smart! We were able to teach her to sit, shake with both her right and left paws, and 'walk pretty' in one week! This is her getting ready for bed in her PJ's."
The beagle is a breed of small hound that is similar in appearance to the much larger foxhound. The beagle is a scent hound, developed primarily for hunting hare (beagling). Possessing a great sense of smell and superior tracking instincts, the beagle is the primary breed used as detection dogs for prohibited agricultural imports and foodstuffs in quarantine around the world. The beagle is intelligent. It is a popular pet due to its size, good temper, and a lack of inherited health problems.
Not every Beagle visit to the vet is for a genetic problem. The Beagle’s long, floppy ears are prone to chronic ear infections. Left untreated, such infections can cause permanent damage to the ear canal and even destroy your dog's hearing. Checking ears often and seeing the veterinarian at the first whiff of a problem combined with good follow-through will keep a Beagle’s ears from being an expensive and painful problem.
Despite the many endearing qualities of the Chihuahua, if you’re thinking his tiny size makes him a great choice for children, you’d better think again. The Chihuahua may be just right for traveling around in a puppy purse, but he’s far too small and fragile for even the gentlest of children's games. Chihuahuas also tend to be high-strung and prone to nipping, snapping and even biting when frightened or threatened, or when defending his people or territory.
Terrier mix dogs are not very choosy when it comes to food. You can give them any commercial well-balanced dog food. It is better to avoid foods with wheat and corn. You can give them bones or raw meat or any kind of poultry meal. But make sure not to overfeed these dogs and get them into the habit of eating at fixed times. Dry food is preferable for terrier mix dogs. But wet food can be given twice or thrice a week.
As the Chihuahua is generally an indoor dog, it is not fond of the cold, preferring instead warmer regions. For the smooth Chihuahua variety, coat care is minimal, while the long-coated dog needs to be brushed twice or thrice a week. The Chihuahua's exercise needs can be met simply by running around the house, although it enjoys exploring yards or going for a short leash-led walks.
Prone to rheumatism, slipped stifle, colds and gum problems. Also corneal dryness and secondary glaucoma, due to their protruding eyes. Gains weight easily. Take caution around toxic products such as chocolate or fertilizer. This is a very small breed and it will not take much to poison them. Chihuahuas are often born via cesarean section because puppies are born with relatively large heads. Susceptible to fractures and other accidents in puppyhood. Some Chihuahuas have a molera, an unclosed section of the skull which can remain open throughout life. This makes the dog prone to injury. Has a tendency to wheeze and snore because of their small, short muzzles. Prone to stress, caused by the owners tendency to treat them like little babies. All dogs, even tiny ones, need to feel their owners are strong-minded beings able to handle the entire pack.
Beagles imports began arriving in America in the years after the Civil War, and their popularity among U.S. rabbit hunters was immediate. The AKC registered its first Beagle, named Blunder, in 1885. To this day, “beaglers” in woodsy areas of North America still swear by their breed’s great nose, musical voice, and enthusiastic approach to rabbit hunting.
For thousands of years dogs have been bred. From time to time humans have done inbreeding even from their own ancestral lines and also by mixing them from various lines. Over the centuries the whole breeding process is continuing until the present day, resulting in a huge genetically diversity of all types of dogs, breeds and hybrids, no other mammal can present. Furthermore no speciation developed, despite the appearance of a wide variation of dogs no other animal could obtain. Just compare the extreme difference between a Chihuahua and a Great Dane.