According to an animal welfare society in Germany, hundreds of cats are being left at animal shelters following the disclosure earlier in the week that a cat on the island of Ruegen had died from the deadly bird flu.
The charity says they are examining the abandoned cats for any sign of illness including bird flu.
German veterinary authorities confirmed last week that a dead cat found on the Baltic island of Ruegen had been infected with the highly pathogenic strain of H5N1 bird flu that can prove fatal to humans.
Back in 2004 the disease was responsible for the deaths of both domestic and wild cats, including dozens of tigers; however the cat found on the island was the first case of an infected mammal in the European Union.
It remains unclear however whether the EU's first feline case of bird flu is added cause for concern and that people could contract the virus from cats.
Serbia too has found it's first case of a strain of bird flu in a swan found dead in a Serbian region bordering Croatia and Hungary which has tested positive for the virus.
Afghanistan is also testing samples from dead chickens and has quarantined a number of chicken farms.
The U.S. Food and Drug Administration has issued draft guidelines allowing faster approval for seasonal and pandemic flu vaccines.
It is thought the movement of migratory birds has accelerated the spread of the virus to at least 15 countries since the beginning of February.
The H5N1 bird virus has now been found in Asia, the Middle East, Europe and Africa.
According to the Food and Agriculture Organization of the United Nations, to date the virus has killed at least 94 people since late 2003, and more than 200 million birds worldwide have been culled or died as it spreads relentlessly across Asia, Africa and Europe.