Mice are generally fed a diet containing low fiber (5%), protein (20%) and fat (5-10%). It may be preferable to replace breeders when they are 6 months old. Breeding onset is 7 weeks and breeding life is 7-9 months.
Young are weaned after 21 days at which time they are 10-12 g. They are born hairless and their eyes open after 10-12 days. The young are born incompletely developed (altricius). Maternal antibody is transferred to the fetus in utero and to the newborn via colostrum. Delivery lasts 1-4 hours, if labor persists call a veterinarian (5-3713). Babies are born either head or tail first (breech). Stretching and hindleg extension are usually signs of impeding birth. Birth usually occurs at night with 10-12 pups being born. Females will build a nest prior to parturition if opportunity is provided. Plugs persist for 16-24 hours and may last as long as 48 hours. Mating leads to formation of a vaginal plug. Ovulation occurs at the end of metestrus. The stage of the estrous cycle can be determined by vaginal cytology. Mice have a 4-5 day estrous cycle, divided into characteristic phases: proestrus, estrus and metestrus. Mice have an os penis or os clitoridis associated with external genitalia. The inguinal canal remains patent throughout life. There is a vaginal closure membrane, which is lost at puberty. There are separate urethral and vaginal openings. Mice have two distinct cervices and uterine bodies. mites, fungi or bacteria by a veterinarian.
ARE MICE NOCTURNAL SKIN
It is important that barbering is differentiated from other causes of hair loss or skin problems e.g. Separating the dominant mouse often leads to rise of another dominant mouse. It appears to be of no sequelae for the health of the mice. There are some suggestions that it may be a cooperative and/or learnt behavior. Subordinate animals may have their whiskers, trunk or flank hair removed. This behavior is especially evident among females and is more common in some strains than others. This hierarchical system creates a situation whereby the dominant animals often barber (chew off the hair) those of lower rank. Mice are communal animals with a social hierarchical system. Most of mouse behavior is pheromone driven. Mice are nocturnal animals but adapt to their environments. Mums with newborns will likewise aggressively defend their pups and territories. Within these groups they will aggressively defend their territories. Mice are communal animals, which live in a very hierarchical society. The amount of secretions increases during stress and appears as 'red crusts' around the eyes and nostrils. Secretions from the gland contain varying amounts of reddish-brown porphyrin pigment depending on the physiologic state, age, strain and sex of the mouse. Mice have a large horseshoe-shaped Harderian gland deep within the orbit. There is no permanent cure for overgrown teeth the only treatment is to trim the teeth every 2-3 weeks, if malocclusion persists. Malocclusion can be hereditary or follow trauma, disease or inappropriate diet and/or soft food. Due to this continuous growth of the incisors mice can have problems with overgrown teeth when the upper and lower incisors do not meet properly (malocclusion). Molars are permanently rooted while the incisors have an open root and grow continuously. Mice have a pair of incisors and three pairs upper and lower of molars. Insert picture of a mouse, get those cool ones. The mouse has short hair, a long naked tail, rounded erect ears, protruding eyes, a pointed snout and five toes on each foot. Most of the common laboratory strains were developed in the early 1900s. Later in the 19th and 20th century they were bred for their coat color, and subsequently characterized genetically. Mice were first used for the study of respiration in the 17th century. The mouse is probably the most genetically and biologically characterized mammal in the world. The laboratory mouse, Mus musculus, belongs to the order Rodentia and family Muridae.
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