Aristophanes wrote:
About a month ago a cat starting hanging around my place (I live in the country side), at first I wasn't sure if he was a neighbor's cat or a stray, he kept his distance as I worked and I left it at that. After a week or so it became apparent he was in fact a stray, I doubt he's more than 6 months old-- he's very small. So I adopted him because he's well natured and in need of a home and my dog passed about 3 months ago, so I have space and time.
Anyhow, I did like any good autistic would do and read everything I could on cats and caring for cats to make sure I was doing the correct things. One problem I have that I haven't found an answer for is food. I've tried four different brands of wet cat food of varying flavors and he refuses to eat any of them. I know cats can be picky, but goddamn. The only thing I've been able to get him to eat is canned tuna, of which I mix with generous amounts of water since I live in a hot dry place (semi-arid highland), hence the reason dry food is out, he's going to need the water content of wet food. One thing that concerns me is that there's no calcium in canned Tuna, and when I mix bone meal in with the tuna he refuses to eat that as well. I'm not overly concerned at the moment, I know he hunts small rodents and lizards around my place, but when winter hits those prey items will be long gone and his calcium intake with them. So my question is: does anyone have any helpful advice on how to get him to eat something with calcium in it?
It's fine to feed the cat dry food, provided you also leave water for him. Cats like cups of water scattered around the house that have been sitting for a day or two.
Cats cannot subsist on canned tuna alone because it's high in mercury and, as another poster pointed out, lacks taurine, which is an essential amino acid cats need to prevent blindness and other health problems, and canned tuna also lacks thiamine (vitamin B1) which can leave the cat with a severe, life threatening thiamine deficiency. Canned tuna may also be implemented in oral cancer in cats, so it's really one of those things that should be only given on occasion as a treat, unless your vet indicates otherwise for some reason (for example, the cat is ill and tuna is the only thing the cat will eat as a result of that).
So as I said, it's fine for your cat to eat dry food provided you leave water out and the cat is drinking it. You might leave a little wet and a little dry and see what the cat prefers.