Absolutely, when you have defined what you mean by "sick" (what are your criteria and what are the supporting facts that animals would be sick?), Since that is what my answer.
sick
adjective
(Latin male habitus, which is in poor condition) Larousse
A disease is only decreed as such after a thorough examination, but limited to the knowledge of the moment. (the imaginary patient illustrates this well)
Have these animals been the subject of clinical examinations? It seems not! So any opinion on this subject is subjective! Only a comparison with other proven cases can possibly make it possible to get an idea: survivors of Hiroshima, Nagasaki, Chernobyl, "peaceful" nuclear tests, etc ... However, it seems that certain effects cannot be measured. , in terms of pathology, only in the very long term after exposure and depending on the level of exposure as well. So let's wait for unpaid results from authorities too concerned with their political or economic self-protection.