Experience? My number of animals says it all! I also rescue and educate people about the benefits to spaying/neutering. I have also fostered animals for OK Humane Society for many years.
I know CPR, Heimlich maneuver, can administer medications and am not afraid to clean up pet messes.
I prefer to house-sit when I sit for animals, it helps them with anxiety and keeps them confident, not to mention making it look like someone is in your house while you're not there is added security.