There are stray cat rescue kits you can purchase online which are ideal for short term care of a cat. They make several different cages such as rescue traps, cage dividers (allows the cage to be used as a feeding and watering area) and burlap cover traps which help camouflage the trap and soothe the the cat once it is trapped. You can use sardines, canned tuna, chicken, fish and meats as bait inside the trap to lure it inside the trap. You may want to consult with your state, county and municipal laws related to cats vary. Consult with local humane league, animal shelter, or local or state Game Commission to determine the correct method of relocating a captured stray cat. Before trapping, call your local humane league, SPCA or similar organization to discuss their suggested method of rescuing stray cats and all of the options available to you. It is best to follow the guidelines they endorse when transporting the caged cat to their organization. The majority of these organizations can be found in the telephone directory. Please be certain of the course of action you would like to pursue before rescuing a stray cat. When you choose to rescue stray cats, it is important that you contact your local humane league, animal shelter or other similar organizations to learn the local regulations and policies pertaining to your community before trapping.
Source(s)
http://en.wikipedia.org/wiki/Feral_cats
http://www.havahart.c...ive-animal-traps/1099