This is a very sad subject. Remember when you come to this particular forum, Health & Medical, you are going to be reading about sick or injured greyhounds. Try to keep that in perspective, and when it gets too much, take a break and go to all the other forums for a while.
I have had four greyhounds diagnosed with cancer, their ages were 6, 8, 11, and almost 13 when they went to the Bridge. The last non-greyhound I had was taken by cancer also, he was a beagle.
Yes we do see a lot of greyhounds diagnosed with cancer. Other breeds get cancer also, especially other long boned breeds. When I had one of my greyhounds at A & M University small animal clinic, they told me they see more boxers with cancer at the vet school clinic then other breeds. That was about three years ago. That probably varies depending on university location.
Sometimes some of us get into sort of a "debate" of sorts over the ever present questions of "am I spoiling my greyhound?" when it comes to food. My take on this subject is..... the only things I have control over with these gentle souls are what goes into them and their environment, and of course, keeping them safe. Because of that I see to it that they are not exposed to chemicals, and I give them what I feel are the best foods for them, and when I have a picky one, like my hearthound Molly was and like Renie is, I will find what they will eat that is healthy for them, and that they are happy to eat. I don't care if it is roast beef, baked chicken or ground round meatloaf like I used to make for Molly, or the BARF diet that my hounds are on now.
I don't know how long they will be with me, so I just want them to be content.
When DH goes grocery shopping with me and we get to the meat department, as I am putting meat in the basket he always asks "is that for me or the greyhounds?" It is usually for the greyhounds.