Hungary , Italy , Italy notified last year about possible issues . Irish officials said they were concerned about paper trail surrounding several thousand horse . The discovery of horse meat in beef products has put Europe 's meat industry in disarray . Irish investigators found horse and pig DNA in hamburger products in January .
Denmark , Hungary , Italy notified last year about possible issues . Danish officials said they were concerned about paper trail surrounding one horse . The discovery of horse meat in beef products has put Europe 's meat industry in disarray . Irish investigators found horse and pig DNA in hamburger products in January .