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Aggression. --- Behavioral development. --- Castrating. --- Castration. --- Mice. --- Neonatal.
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Uit recente literatuur en enquetes blijkt dat zowat overal ter wereld de trend bestaat om katten frequenter te steriliseren en te castreren. Het voornaamste neveneffect van sterilisatie, zowel bij de kater als bij de kattin, is een verhoogde incidentie van obesitas. Dit zou het gevolg zijn van onder andere een verlaagde energiebehoefte na de sterilisatie. Bovendien kan de voederopname slecht gereguleerd zijn na de sterilisatie en kan hyperfagie frequenter voorkomen. Daarom wordt ad libitum voedering afgeraden bij gesteriliseerde dieren. Vaak wordt ook empirisch verondersteld dat de sterilisatie gepaard gaat met een verminderde fysieke activiteit, hetgeen samen met een gedaald basaal metabolisme aan de basis kan liggen van de gedaalde energiebehoefte. Voor de gesteriliseerde kat wordt vaak een energiebehoefte van 230 kJ ME/kgLG aangeraden (270 kj ME/kgLG voor een normale kat). Hiertoe kan de energiedensiteit van het voeder verlaagd worden door het vetgehalte te verlagen en eventueel het vezelgehalte te verhogen.
Ad-libitum. --- Castration. --- Diet. --- Hyperphagia. --- Metabolism. --- Neutering. --- Obesitas.
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Castration. --- Lamb. --- Lambs. --- Method. --- Old. --- Pain. --- Reduction. --- Response. --- Tail docking.
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Following either a) castration or b) both castration and implantation with capsules releasing a constant, physiological dose of testosterone, adult male Mongolian gerbils that had matured in intrauterine positions between two male fetuses still scent marked with greater frequency than did male gerbils that had matured in intrauterine positions between two female fetuses. We also found significant positive correlations between the relative frequency of scent marking exhibited by individual male gerbils when intact, after castration and after both castration and implantation with capsules releasing testosterone. Each of these findings is consistent with the view that differential exposure to testosterone, as a consequence of fetal intrauterine position, has lasting effects on the organization of scent-marking by male gerbils
Adult. --- Castration. --- Exposure. --- Female. --- Fetuses. --- Frequency. --- Gerbil. --- Gerbils. --- Implantation. --- Intrauterine position. --- Intrauterine positions. --- Male mongolian gerbils. --- Male. --- Marking. --- Mongolian gerbil. --- Mongolian gerbils. --- Mongolian-gerbil. --- Organization. --- Physiological. --- Position. --- Positions. --- Scent marking. --- Scent-marking. --- Scent. --- Territorial marking. --- Testosterone. --- Time. --- Uterine position.
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Small animal practitioners are increasingly confronted with patients showing adaptation related problems (ARP) which are expressed as disturbed or abnormal behavior (DAB). As a result, practitioners are asked increasingly to euthanize animals which seemingly cannot be socialized. In healthy dogs and cats, three main causes for DAB can be detected: refusal of obedience because of the drive for dominance; anxiety and frustration; and geriatric DAB. Increasingly, disease conditions not readily diagnosed can cause DAB, especially hypothyroidism. Influencing and contributing factors to DAB are breed, sex, experiences as a puppy, behavior of owners, changes in the pet's environment. ARPs may also cause disturbances in the condition of skin and fur, e.g. atopic dermatitis, pruritus sine materia, lick granuloma, and of the intestinal organs (vomiting, irritated bowel syndrome) and may result in an immune deficiency. Therapeutic approaches include behavioral therapy, surgical or hormonal castration with progestins or antiandrogens, substitution with thyroxin in cases with hypothyroidism, and/or the use of psychopharmaca, most prominently of modern antidepressiva like amitriptyline; buspirone; clomipramine and fluoxetine, but also of selegiline, a mono-aminoxydase inhibitor. These compounds, among other effects, are elevating prolactin levels. This seems to allow to formulate a working hypothesis: in the canine species, prolactin is obviously a hormone enabling socialization; hence all drugs which safely cause an increase in prolactin production might be suitable to manage or control ARPs and DAB in the dog, but also in the cat. Higher levels of prolactin than those required for socialization, as seen in nursing bitches or some clinically overt cases of pseudopregnancy, may cause maternal aggression and can be controlled with prolactin inhibitors, if needed
Abnormal behavior. --- Adaptation problems. --- Adaptation. --- Age. --- Aggression. --- Aggressive-behavior. --- Animal. --- Animals. --- Anxiety. --- Behavior. --- Boxes. --- Breed. --- Canine behavior. --- Castration. --- Cat. --- Cats. --- Clomipramine. --- Control. --- Disease. --- Dog. --- Dogs. --- Dominance. --- Drive. --- Drug. --- Drugs. --- English cocker-spaniels. --- Environment. --- Experience. --- Fluoxetine. --- Frustration. --- Fur. --- Hormonal. --- Hormone. --- Immune. --- Increase. --- Level. --- Maternal. --- Nursing. --- Obedience. --- Old. --- Pet. --- Production. --- Prolactin secretion. --- Prolactin. --- Pseudopregnancy. --- Psychopharmaca. --- Puppies. --- Puppy. --- Serotonin. --- Sex. --- Sexes. --- Socialization. --- Substitution. --- Therapy. --- Thyroid-hormone. --- Time.
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