Western chimpanzee – female was over 51 years old and had septicaemia and thrombosis.
Siamang gibbon – put to sleep after the neonate animal was rejected by mother and found comatose.
Goeldi's monkey – had a large cancerous growth.
Labrador dogs (2) – both dogs were around 15 years old. One had severe anaemia and renal failure, while the other dog had severe age-related arthritis.
Grey wolf – wolf sustained severe injuries after it was attacked by other members of the pack.
African lion – lioness was almost 25 years old and had renal failure and muscular weakness making her unable to walk. Her death was documented in RTE'S The Zoo television programme.
Snow leopard – rare leopard was 16 years old and had severe arthritis of the knee.
Eastern bongo (antelope) – bongo had complications at birth which were "incompatible with life".
Tamworth piglet – piglet had a birth deformity (twisted spine) which was incompatible with life.
Texel sheep – paralysis: post-mortem did not reveal any cause for the paralysis.
Patagonian mara (4) – One mara (a type of cavy) had an untreatable intra-abdominal abscess. Another mara had a jaw-bone infection incompatible with life. Two mara were unwell for several weeks and did not respond to treatment. Post-mortem findings revealed protozoan encephalitis.
Common ostrich – ostrich was losing weight over a long period of time. The post-mortem suggested a mycobacterium infection which is an incurable condition.
Greater rhea (3) – birds were found to be carrying salmonella. Treatment over a long period did not eliminate the condition and following the advice of a bacteriologist, these rhea were euthanised.
Chilean flamingo (2) – one had septic feet which was incurable while another had a broken leg which could not be repaired.
Waldrapp ibis (3) – two had birth deformities that were incompatible with life. The third ibis fledged too early and was badly injured.
Domestic fowl (3) – An Australorp chicken which had lost condition and had poor balance. Post-mortem findings were suggestive of Marek's disease – a viral infection of the nerves, a common disease of farmyard poultry. Another Australorp chicken had egg peritonitis. One Brahma chicken had severe lameness that did not respond to treatment. Post-mortem findings showed Marek's disease.
Water monitor – had severe spinal degeneration.