Why Dogs Are Rarely Allergic to Fish

Allergies in dogs and cats are less common than people might think.

Various diseases are commonly attributed to allergic reactions to chicken, pork, beef, rabbit and others, but quite often the food intolerance is not to the protein but to the presence of antibiotic residues coming from an intensive farming system. The meats that small animals are most frequently hypersensitive to are beef and chicken, while fish is the least often.

Fish from the sea, even if it is bred, does not trigger these reactions. The reason seems to be that while other animals farmed for meat are taking antibiotics every day through medicated pet food, fish are not given antibiotics during their breeding cycle except for cases of acute disease. In fact, According to the CEE regulation no. 2377/90 the use of antibiotics in aquaculture is intended only for therapeutic purposes.

Fish belonging to the Mackerel family are being poisoned due to high levels of histamine and a strictly correlated deterioration phenomenon. This includes common species like tuna, mackerel, sardine, anchovies etc. Such species are rich in free amino acid, a histidine which is transformed into histamine from the negative flora gram. When the conservation temperature is low, the formed histamine level remains low but not enough to cause intoxication symptoms, but when the temperature exceeds 15°C the level of histamine products exceed 100mg per 100gr and may cause symptoms. The actual legislation (DL.vo 531 of 30 December 1992) expects that 9 samples be withdrawn for which the average content cannot exceed 100mg/100gr, two samples can have values between 100 and 200 and nothing, but should exceed 200mg/100gr.

Antibiotics in aquaculture is expected to be used only for therapeutics, as advised by the law (CEE)n.2377/90.

In general, fish diseases have an extremely rapid diffusion that in some cases reach a mortality percentage up to 90%, like in the case of furunculosis Aeromonas salmonicida and the “red-mouth disease” Yersinia (2, 3, 4). Therefore in breeding, to encompass the economic losses, treatments are carried out at the first symptoms of disease.