i would find somewhere else for your chin to be during the spraying, and for a day or two at least afterwards. ask the eterminator what chemical they are using, and what the guideline is on how long until pets and humans can return to the area. also ask if it's ok to wash the sprayed area right after or if the spray needs to stay on surfaces for any time.
a lot of the sprays that exterminators use are pyrethrin based, and pets cannot be in the area while it is being sprayed. i know it is a fatal chemical to birds and fish - about a year ago my apartment was sprayed, and although i didn't have chins at the time, i had to wrap my fish tanks air tight with thick garbage bags for hours and haul all my spare tank equipment outside to keep it from getting residue on it. i was instructed to not wash any floors or anything for a week after, so that the chemical could do its job.