by peli » Fri Sep 18, 2009 3:59 pm
Adjusting to a new home can be tough, and the stress sometimes makes illnesses your kitty may have already had but were not apparent worse. He might have an upper respiratory infection, parasites, or any number of less common things. Unfortunately without an exam (and I'm glad you're already committed to getting him looked at- good job) there's no way to tell.
At his young age he will not last long without food, so I'm hoping you intend to take him to the vet tomorrow! Most vets will let you drop him off while you are at work if your schedule is hectic, but sooner rather than later is best.
Until he sees the vet supportive care is all you can really do, since you can't really know what is wrong. Don't force feed, but tempt him with yummy things like canned food, tuna, cheese, etc. Keep him comfy and perhaps confine him to a quiet room to decrease stress.
And, no, the dog food had nothing to do with this. Dog food is not poison to cats, it just has insufficient levels of the amino acid Taurine. Long term taurine deficiency will cause heart problems, but even long term sneaking a kibble or two from the dog bowl won't do that. As long as he gets the bulk of his daily nutrition from kitty food, you're fine there.