Tag Archives: Chihuahuas

Pregnancy

Physiology and Endocrinology The eggs released by the bitch are fertilized in the uterine tubes and move into the uterus 8 to 9 days after ovulation. The conceptus implants and the placenta begin to be formed 16 to 18 days after ovulation. High concentrations of progesterone must be present throughout pregnancy. Progesterone during pregnancy decreases uterine contractility; stimulates secretions of the endometrial glands, which presumably provide nutrients to maintain the conceptus before implantation; and stimulates mammary development. Prolactin concentrations begin to rise at midgestation. Concentration of relaxin, released from the placenta, also rises beginning at midgestation (). The body of the bitch responds to the presence of the enlarged uterus and developing fetuses with processes designed to maintain function in the bitch while promoting development and growth of the puppies. Physiologic changes in the bitch that occur during normal pregnancy include the following: • Increased heart rate • Increased packed cell volume (% of the blood made up of red blood cells) • Increased oxygen consumption • Slower gastric emptying time • Increased blood flow to the kidney Superfecundation Read more […]

Intention tremors due to cerebellar disorders

Tremors that occur when an animal intends to move in a goal-orientated activity are most often the result of cerebellar disease (). Degenerative diseases Cerebellar cortical degeneration Cerebellar cortical degeneration, also termed cerebellar abiotrophy, is usually an inherited disease in dogs () with few reports in cats. Primary cerebellar cortical degeneration refers to degeneration and loss of Purkinje cells, molecular cells and granule cells. Clinical signs: These diseases are recognized syndromes in American Staffordshire Terriers, American Pit Bull Terriers, Kerry Blue Terriers, Gordon Setters, Rough-coated Collies, Border Collies, Brittany Spaniels, Bullmastiffs, Old English Sheepdogs and occur rarely in Samoyeds, Airedales, Finnish Harriers, Labrador Retrievers, Golden Retrievers, Beagles, Cocker Spaniels, Cairn Terriers, Great Danes, Scottish Terriers and others (). Clinical signs usually begin between 3 and 12 months of age. However, a subset of adult onset diseases occur with signs starting from 2-8 years of age in the Brittany Spaniel (), Gordon Setter (), Old English Sheepdog (), American Staffordshire Terrier () and Scottish Terrier (). Other signs of cerebellar disease that accompany cerebellar Read more […]

Bone Heart Diseases

Diseases Of Different Organs Cardiac Failure Heart problems usually relate to either valve disease or deterioration in the heart muscle. Both make the heart less efficient in maintaining circulation, with consequent congestion due to accumulation of abdominal fluid in severe cases. Some dogs develop a characteristic dry cough on exercise. Hot summer days mean added stress on dogs with faulty heart function, and fainting and collapse can easily occur if the dog stays in the sun, especially if the dog is also obese. Some infectious diseases result in deterioration of the heart muscle, but heart valve deterioration is usually associated with age, although the two diseases may occur simultaneously. Drugs are available for many heart conditions and suspected cases need veterinary attention sooner rather than later. With proper treatment and revised life style they need not be fatal. Parasitism caused by heart worm (Dirofilaria immitis) can bring serious heart disorders. The parasite is widespread in the United States and in tropical areas of Asia and Africa. A mosquito is needed to complete the life-cycle of heart worms. Treatment and prevention are specialized areas of medicine, sometimes requiring surgical intervention. Endocarditis When Read more […]

The faults and defects of the breeds: Toy Dogs

Affenpinschers Patella luxation, either medial or lateral; Legg-Calves Perthes disease Brussels Griffon Shoulder dislocation Cavalier King Charles Spaniels Patella luxation; Episodic weakness and collapse, a rare, inherited disorder Chihuahuas (Long and Smooth coats) Shoulders dislocation; Patella luxation, medial or lateral; Hypoplasia of dens, which produces atlantoaxial subluxation, causing neck pain and quadriplegia Chinese Cresteds Medial patella luation; Legg-Calves Perthes disease English Toy Spaniels (Blenheim/Prince Charles and King Charles/Ruby) Patella luxation, medial or lateral can occur with medial the most common, Congenital Femoral Shift Italian Greyhounds Predisposed to forelimb fractures Japanese Chin Dwarfism Maltese Patella luxatin Miniature Pinschers Shoulders dislocation; Legg-Calves Perthes disease; Epiphyseal dysplasia; Decreased long-bone growth; OIsteopenia Papillons Patella luxation Perkingese Hypoplaisa of dense (Odontoid Process, an atlantoaxial subluxation, causes neck pain and quadriplegia); IVD (intervertebrate disk disease); Swimmers syndrome; Atypical pannus; Legg-Calves Perthes disease Pomeranians Patella luxation, either medial or lateral; Dwarfism; Read more […]

Anatomy Of The Dog: What is a Breed

A few months ago, the United Kennel Club added nine breeds, to its registry, bringing its total to 160. Last month, the American Kennel Club announced the addition of the American Kennel Club announced the addition of the American Eskimo to its miscellaneous group, the first step towards official recognition as an AKC breed. The new UKC breeds are Petit Basset Griffon Vendeen, Canaan Dog, English Toy Spaniel, Finnish Spitz, Greater Swiss Mountain Dog, Manchester Terrier, Polish Owczarek Nizinny, Tibetan Spaniel and Shiba, all but the Nizziny are recognized by the AKC, some of them for many years, and AKC’s newest, the American Eskimo, has been a UKC breed for a long time. Both registries seem to be in race to add new breeds to their lists, a race that some critics say is an effort to increase the treasuries of both organizations. This rush, along with the apparent whimsical assignment of breed status in some cases, an increase in breed-specific laws in the last few years, and the call by animal rights advocates for a ban on breeding pure bred dogs, has caused some to wonder about the definition of breed. So what is a breed? Webster’s Desk Dictionary of the English Language defines a breed as “a homogeneous grouping Read more […]