There are so, so many reasons and cat illnesses that can cause a cat to slow down on eating or stop altogether, so assist feed your cat to ...
If you cook at a high temperature (400-450Â°F), cooking time will only be 15-20 minutes. At a lower temp (325-375Â°F), 25-30 minutes is a good guideline. Obviously, this depends on the thickness of your poultry. I use either convection roast or convection bake when cooking chicken breasts.
The cooking time of boneless skinless chicken breasts depends upon  the weight. A 1 pound breast will take between 45 and 60 minutes in  a 350 degree oven. 1 person found this useful.Edit.5-40 min depending on your oven and the size of the chicken breast, but normally 30 min at 400. + 17 others found this useful. Sohna Butt.