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Makanya A, Mills-Thompson AN, Nguhiu-Mwangi J, Oduma J, Ojoo R. "Morphometric and stereological methods for quantifying the coarse structural parameters of the ruminal tissues in sheep." International Journal of Veterinary Science and Medicine. 2020;8(1):59-70.
Otsyina HR, Mbuthia PG, Nguhiu-Mwangi J, Mogoa EGM, Ogara WO. "Effect of ruminal plastic bags on haematological and biochemical parameters of sheep and goats." Ghana Journal of Agricultural Science. 2018;53:5-16.
Otsyina HR, Nguhiu-Mwangi J, Mogoa EGM, Mbuthia PG, Ogara WO. "Knowledge, attitude, and practices on usage, disposal, and effect of plastic bags on sheep and goats." Tropical animal health and production. 2018;50(5):997-1003.
Nguhiu J, P M F M, JK W, Mbuthia P G. "Disorders of the claw and their association with laminitis in smallholder zero-grazed dairy cows." International Journal of Veterinary Science. 2017;6:64-69. Abstract
Otsyina H, Nguhiu J, E M, Mbuthia P G, W O. "Effect of ruminal plastic bags on wellbeing of goats." Bulletin of Animal Health and Production Africa. 2017;65:435-443. Abstract
Samuillah MH, Varma V, Nguhiu J, Mogoa E. "Incidence, types and outcomes of distal limb fractures of racehorses in Kenya: a retrospective study of radiographs (2005-2014)." International Journal of Veterinary Science. 2017;6:81-85. Abstract
Gitari A, Nguhiu J, Varma V, Mogoa E. "Occurrence, treatment protocols, and outcomes of colic in horses within Nairobi County, Kenya." Veterinary World. 2017;10:1255-1263. Abstract
Nancy-Mills A, J O, Nguhiu J, R O, A M. "Plasma cortisol levels as a measure of stress in rumen impaction in sheep." Journal of Veterinary Medicine and Research. 2017;4:1075. Abstract
Otsyina H, Nguhiu J, E M, Mbuthia, P.G., W O. "): Clinical manifestations in sheep with plastic bags in the rumen." Ghana Journal of Agricultural Science. 2016;51. Abstract
Gitari A, Nguhiu J, Varma V, Mwangi W, Konde A, Rashid F. "Hematological and Biochemical Changes in Horses with colic in Nairobi County, Kenya." International Journal of Veterinary Science. 2016;5:250-255. Abstract
Nguhiu J, P M F M, Mbuthia P G. Claw Disorders in Dairy Cows Under Smallholder Zero-grazing Units. Saarbrucken, Germany: Scholars’ Press; 2015. Abstract
Otsyina H, Nguhiu J, E M, P M, W O. "Prevalence of indigestible rumen foreign bodies in sheep and goats at Dagoretti and Kiserian abattoirs, Kenya." International Journal of Veterinary Science. 2015;4:75-80. Abstract
Mwangi W E, Mogoa E M N-MJ, CM M. "Effects of epidural Ketamine, Xylazine and their combination on body temperature in acepromazine-sedated dogs." International Journal of Advanced Research. 2014;2:336-340. Abstract
Mwangi WE, Mogoa EM N-MMCMJ. "The hematological and cardiopulmonary effects of epidural xylazine, lidocaine and their combination in acepromazine sedated dogs." International Journal of Veterinary Science. 2014;3:46-51. Abstract
Otsyina H, Nguhiu J, Mogoa E MPGOW. "A retrospective study on the prevalence of plastic materials in the rumen of sheep and goats in Nairobi, Kenya." Bulletin of Animal Health and Production in Africa. 2014;62:197-205. Abstract
Nguhiu J, JW A, E M, P M F M. "Indicators of poor welfare in dairy cows within smallholder zero-grazing units in the peri-urban areas of Nairobi, Kenya.". In: Insights From Veterinary Medicine. Rijeka Croatia: InTech Open Science Publishers; 2013. Abstract
Mbithi PM;, Mulei, CM; Mwangi JN, Mulei, CM; Mwangi JN. Veterinary handbook on Routine Operative Surgical Procedures.; 2013. AbstractWebsite
Nguhiu J, P M F M, JK W, Mbuthia P G. "Risk factors for non-infectious claw disorders in dairy cows under varying zero-grazing systems.". In: A Bird’s-Eye View of Veterinary Medicine. Rijeka Croatia: InTech Open Science Publishers; 2012. Abstract
Aleri JW, Mogoa EM, Mulei CM. "Welfare of dairy cattle in the smallholder (zero-grazing) production systems in Nairobi and its environs.". 2012. Abstract

Animal welfare is defined as the ability of an animal to interact comfortably with its environment through its physiological, psychological and behavioural systems. About 70% of dairy production in Kenya is from the smallholder production systems. These production systems are negatively impacted by a number of factors including poor nutrition, substandard husbandry and management practices, lack of appropriate farm inputs, diseases and low incomes. These factors influence the welfare of dairy cattle, hence their importance for its evaluation. This study was therefore designed with the following objectives: 1. to determine the welfare of dairy cattle in the smallholder production units in Nairobi and its environs, 2. to determine the risk factors contributing to poor welfare of dairy cattle in the smallholder production units, 3. to determine the indicators of poor welfare of dairy cattle in the smallholder production units, 4. to determine the farmers’ and stockmen’s perspectives of animal welfare. These objectives were achieved through a cross-sectional study carried out in 80 smallholder dairy units purposively selected in Nairobi and its environs, in which 306 dairy cows were examined. The welfare of cattle in these dairy units was evaluated through several methods which included: visual observations for animal- and farm-level factors that indicate poor welfare of cattle; taking measurements of dairy housing unit dimensions such as cubicle, walk-alley, kerb and feeding bunk; and using a structured questionnaire to interview farmers and stockmen on nutritional regimes and other management practices such as removal of slurry, milking techniques, record keeping and disease control. These factors were recorded and later analyzed. Analyses included descriptive statistics, and simple associations using chi-square at p< 0.05 significance level. Over 80% of these smallholder units had factors that contributed to poor welfare of dairy cattle. These factors included under-size cubicles, small walk-alleys, too high feeding bunks with traumatic edges, too low positioning of neck rails at the feed bunks, sharp objects and edges within the housing units and dilapidated housing structures. The main evidence of poor welfare was injuries on the animals. The body condition score (BCS) of the cows was the main indicator of welfare relating to feeding. Presence of injuries or scars on the skin at various parts of the body was considered a positive indicator of poor welfare either associated with housing structures, management practices or animal interactions. Other causes of poor welfare of the cows were hind-limb tying during milking, teat pulling during hand-milking, more than 24-hour delay before sick cows were treated, and mixing of cattle of different age-groups in the same compartment. Cow-human interaction was poor as evidenced by fearful response and long avoidance distance. This study concludes that poor welfare of dairy cattle exists in all the smallholder units evaluated, which is mainly caused by improper housing and management. Training of farmers and stockmen on animal welfare issues would therefore be a prerequisite to the improvement of dairy cattle welfare. Research on the physiological response to poor welfare of dairy cows in the smallholder units needs to be carried out to enhance the understanding of the impact of these risk factors on smallholder dairy animals.

P M F M, Nguhiu J, CM M. Basic Principles of Veterinary Surgery. Nairobi, Kenya: University of Nairobi Press; 2009. Abstract
Nguhiu-Mwangi J, Wabacha JK, Mbuthia PG, Mbithi PMF. "Retrospective study of foot conditions in dairy cows in urban and periurban areas of Kenya.". 2008. Abstract

A retrospective study was carried out to determine categories, patterns and outcomes of foot conditions in dairy cows from smallholder units in and around Nairobi, Kenya. Analysis was done on 625 hospital case records of dairy cows admitted and treated for foot conditions from 1981 to 2006 at the Large Animal Hospital, Faculty of Veterinary Medicine, University of Nairobi. The records were from cows that had been through one or more parities. Data included type of foot lesion, the affected limb and the claw, and the outcome of treatment. Relative percentages of the foot lesions were computed. Foot lesions with the highest percentages of occurrence were interdigital necrobacillosis (36%), interdigital fibroma (12%) and sole abscess (11%). Others with lower percentages included trauma (8%), claw overgrowth (7%), sole necrosis (severely eroded and necrotized horn of the sole) (6%), septic fetlock arthritis (6%) and septic pedal arthritis (5%). Laminitis and related claw lesions, such as double soles and heel erosion had less than 1% occurrence. The hind feet were affected in 75% of the cases, from which 83% of the lesions involved outer claws. The fore feet were involved in 16% of the cases, of which 57% of the lesions affected inner claws. Simultaneous involvement of both fore and hind feet occurred in only 2% of the cases and 6% of the cows had more than one foot lesion. A total of 90% of the cows were healed after treatment, 6% were slaughtered and 4% died. The results of this study indicated that a high percentage of cases of foot conditions referred to the Animal Hospital from smallholder dairy units in and around Nairobi were infective and a lower percentage was laminitic. We recommend that a farm-level prospective study be conducted in the same area to verify this status.

J N-M, P M F M, JK W, Mbuthia P G. "Radiographic features of laminitic claws of dairy cows around Nairobi.". 2007. Abstract

The objective of the study was to determine the common radiographic features in laminitic claws from dairy cows using abattoir samples. A total of 192 claws were collected from Wangige slaughter slab and 126 claws from Kiserian abattoir. The claws were examined for gross lesions. Dorso-palmar/ dorso-plantar and lateral radiographic exposures of each clawwere taken and evaluated for radiographic changes. Subclinical and chronic laminitis was respectively present in 35% and 21% of the claws examined and 44% of the claws showed extreme deformities. Concurrent appearance of lesions was in 27% of the claws.Radiographic changes were observed in the pedal bones but not in the adjacent joints. Dilated vascular channels (61%) and prominently visible non-dilated vascular channels (24%) in the pedal bones were observed in subclinical and chronic laminitis. The most frequently observed radiographic changes in pedal bones were: irregular (serrated) margins (14%), exostoses (8%), and narrowing (6%), complete absence (3%) or partial absence (1%) of its apex.Other changes on the pedal bones were: rotation (4%), "dropping (sinking)" (3%), fissure fractures (2%), periostitis (1%) and osteolysis (1%). Most of these radiographic changes were seen in claws that had chronic laminitis with extreme deformities. It is concluded that radiographic changes in laminitis occur during the chronic phase and are most severe when concurrent extreme deformities of the claws are present.

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