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Calle Miguel Servet, 177, 50013 Zaragoza, Spain
University of Zaragoza, Spain
D. Lacasta


09/1970-06/1981  Colegio Corazonistas Zaragoza. EGB, BUP and COU (general qualification for veterinary entrance)

09/1981-06/1986  University of Zaragoza (Spain). Veterinary School. Qualification as a veterinary degree.

03/2017  University of Zaragoza (Spain). Doctoral thesis: “Monitoring of parameters of feeding, production and meat quality in feedlots lambs in commercial conditions”.

Supervisor: José Antonio Beltrán Gracia. Animal Production and Food Science Department.



12/1987-06/2005 NANTA S.A (Aragon, Navarra, Rioja, Basque Country). Specialliced  in Ruminants Advisor. Full time employment.

07/2005-12/2009  NANTA S.A. (all company, Spain and Portugal). Horses Product Manager. Full time employment.

07/2005-03/2018 (ongoing) NANTA S.A. (all company, Spain and Portugal). Small Ruminant Product Manager. Full time employment.



01/2017 ongoing.  SheepNet partnership. This project has received funding from the European Union’s Horizon 2020 research and innovation Programme under grant agreement N° 727895.




Variation in the welfare of milking goats and sheep in commercial farms: differences among species, geographical locations, farm sizes and production level of farms.


XLX SEOC Conference. Castellon 2015

Nutrición en corderos de cebo

(Nutrition in feedlots lambs).


XXXV SEOC Conference. Valladolid 2010

Planteamientos nutricionales según formas de suministro y resultados de gestión en pequeños rumiantes.

(Farm management and feeding systems in dairy small ruminants: A nutritional Approach)



XV 3R Congress. Paris 2011

 Variation du pH du rumen a l’abattage d’agneaux “ternasco” en Espagne

(Variation of rumen pH in slaughtered “ternasco” lambs in Spain)


XIII 3R Congress. Paris 2008

Variation du pH dans des carcasses commerciales d’agneaux.

(Varition of meat pH in lamb  commercial carcasses)


XI 3R Congress. Paris 2006

Etude de la pathologie d’agenaux en bâtiments de classement-allotement en Espage.

(Study of pathologie in classification feedlots lambs in Spain)



J.M. Bello, A.R. Mantecón, M. Rodriguez, R. Cuestas, J.A. Beltran, J.M. Gonzalez

Fattening lamb nutrition. Approaches and strategies in feedlot

Small Ruminant Research 142 (2016) 78–82


Bello JM, Arroyo G, Ruiz S, Gonzalez G, Marques F, Mantecon AR and Lavin P

Welfare Indicators of Milking Sheep and Goats in Commercial Farms in Spain:

Evaluation and Differences among Species, Locations and Performances.

Journal of Animal Nutrition. 2016. Vol.1 No.4:17


J.M. González, J.M. Bello, M. Rodríguez, T. Navarro, D. Lacasta, A. Fernández ,M. De las Heras

Lamb feedlot production in Spain : Most relevant health issues

Small Ruminant Research 142 (2016) 83–87


  1. Rodríguez,, J.M. Bello, J.M. González, N. Fernandez

Housing: A major success factor in feedlot lambs.

Small Ruminant Research 142 (2016) 72–77


Leonel N Leal, José A Beltrán, Verónica Alonso, José M Bello, Leo A den Hartog, Wouter H Hendriks, and Javier Martín-Tereso

Dietary vitamin E dosage and source affects meat quality parameters in light weight lambs.

( DOI 10.1002/jsfa.8635. 2018


  1. N. Leal, S. K. Jensen, J. M. Bello, L. A. Den Hartog, W. H. Hendriks and
  2. Martín-Tereso

Bioavailability of α-tocopherol stereoisomers in lambs depends on dietary doses of all-rac- or RRR-α-tocopheryl acetate.

Animal, page 1 of 9 . The Animal Consortium 2018 doi: 10.1017/S1751731118003373