Just to let you know that my boys are cat safe. Some are not. I got my boys from a group that samll animal tests. My suggestion is for your friend to see if she can get a muzzle and see how the greyhound reacts to the cats or if she can put the cats in a separate room if the greyhound is not small animal safe. If you can find out for me, the tattoos on the ears of the grey, I can find out from what group it was originally adopted out from. If there is anyway I can help in getting this poor baby back to the adoption group or his owner, let me know. I can also put out a bullitin on my greyhound board. Please keep me posted.